These are my personal experiences of the trip as a fit and strong 40 year old crossfitter who can ride a bike but isn't a sport specific cyclist.
Pre trip experiences: This was my first MBA trip and the style of putting all trip details on the website seemed helpful but actually the kit list, itinerary and the FAQs were in some or many places not helpful or accurate. E. g. FAQ about water being supplied on trip was not my experience - in country the guides told us to buy 5L bottles from shops as we went round for our own drinking water management.
The kit list is generic and high level and needs more detail for the specifics of desert cycling in a hot country. You won't be most comfortable if you stick to the generic kit list on the website.
The itinerary for the trip was changed by local operator as they thought it provided a better experience. Of course they asked the group's opinion/consent, but since I had never been to Namibia or cycled a lot how was I to know any better. To be clear I'm not saying it resulted in a problem but just an FYI what you see on the website isn't necessarily exactly what you will do or in that order. And for trips like cycling where cyclists like to know all the distances and timings that can be important to people. Also it didn't make clear that some of the cycling is time bound so if you don't cover the stated distances you will be hoovered up by the support truck before you can complete it, even if you want to complete it. . . i. e. you are involuntarily forced to stop cycling and get on the truck.
Trip experience:
This was a cycling trip and the conditions were uncomfortable and arduous on the bike. . . about 90% of the distance (5 days) takes place on dirt sandy gravelly road tracks which significantly slow less experienced cyclists and are quite arduous and at times leave you feeling a bit unstable. To be clear I can ride a bike competently but to handle these confidently you probably need to have done some moutain bike/off road cycling. Generally the terrain is flat but it's still very challenging due to difficult road surfaces. There is about 10% on tarmac roads which is ok.
Most people on this trip were either elite cyclists, or keen cyclists or endurance athletes (e. g. triathletes). Anyone not in the category basically took an e-bike upgrade option and this made their life a LOT easier on the trip. I probably was the slowest as I neither took the e-bike nor is my training modality of crossfit built for endurance like cycling.
Then there are 2 days of desert cycling on fat bikes. Personally I found this very frustrating, it was either a little on the flat and ok otherwise it was on inclines and declines which were just impossible to complete. You just sunk into the sand on the inclines as you slowed. For some this was an exciting challenge, for me it was just annoying and repeatedly futile. The leader of this activity (a 3rd party, not the local operator) was helpful and supportive but at the end of the day you aren't going to become competent in desert sand cycling in the few hours you have and until you become competent it's a bit frustrating. It's very novel and unique which is great and I'm glad I've tried it but I wouldn't be doing it again by choice.
Accommodation wise there is a lot of camping, and it's made as comfortable as possible with large tents and good ground mats supplied. . . however most of the days we camped were in grounds of hotels, and had I known this I would have liked to upgraded to a room (about half the participants on the trip felt the same) but since we weren't aware of the locations and dates specifically until we arrived on site we invariably found the hotels were fully booked. Only on one night did we manage to get a room and I'm glad we did.
The guides were pretty good. I've read some reviews on MBA of this trip praising them to high heaven and I think they were good but don't stand out vs other trips I've been on. At one point someone came off their bike and the support truck and guide were in front of them so it was down to the lagging cyclists to spot this and help out and call the guide. This was poor and should never happen.
I've never done a safari before that was great, we got to see so many animals that I've never seen in the flesh and there being only 2 days of safari is perfect as you actually get a bit complacement when you see your 50th Zebra and that happens within about 36 hours because we see so much wildlife.
There are one or two free afternoons on the trip and I used these to book some activities for myself, e. g. half day city tour of Windhoek and desert quad biking which was great!
Overall the trip allowed me to do a lot of new things in a country I'd never been to before so it ticked a lot of boxes but my non cycling background made it fall short of the enjoyment I hoped it would bring. A few better details from MBA as well would help better preparation too. The aforementioned "being hoovered up by the support vehicle" if you weren't going fast enough was also quite annoying. I went on this trip to complete the challenges I faced, even if it took me a little longer, and being on a holiday where someone else is dictating this is not the freedom I want from a trip I've paid for. If this was to be the case then the guide should say "if you think you are going to be slower, then you can set off an hour earlier". We weren't given this option and it was quite possible to enact since the roads in Namibia are long and without turn off so you can't go wrong (the entire trip there was no guide at the front of the cycling pack and we didn't need to stick in one group, people were stretched out over 20km on some days). Plus most of us bought Namibian sim cards at the airport so had comms.
If you're a die hard cyclist who enjoys off road I think you'll love it but otherwise do ask a lot of questions pre trip to ensure you get the most out of it and are aware of how challenging it might be.