We don't have one but have been looking at them for 2 weeks, and test drove one. The aluminum wheels are standard. The bed does buckle in the middle, but you can get to the contents through the outside also. From the inside, it looks like a challenge.
The problem we have with it is OCCC. If you get the "standard" options that every dealer seems to order, plus bed over cab and diesel gen set, the OCCC is probably less than 1000lbs. If 3 people are travelling, you will probably go over the OCCC, no matter what you do. We saw one with all the bells we wanted, minus the overhead bed, and it had 1086lbs OCCC. I believe the bed adds 120lbs., comparing other models that are identical but with and without overhead bed.
We are now in stop mode after the OCCC problem. We travel very light, and just 2 of us, plus one cat. The two other models have 100-200lbs more OCCC.
I'm with you on the stupid outside speaker thing.