I found the Boss to be quite reasonably priced considering it's portability and versatility. And yes, it's footprint is quite small, meaning less floor space in the shop needs to be dedicated to a full sized machine and table.
I have a Juki LU-563 walking foot that will rip through all kinds of tactical nylon but won't run the 277 thread required for gun leather. For lighter projects, it's fine, but for the money, the Boss was the clear winner.
Speed and "controlabilty" was the driving factor for me. Ruining a beautiful peice of gun leather with an out of control walking foot is a mistake nobody wants to make more than once. With the Boss, I'm in absolute control.
If you're doing belts, it'll be more of an excercise machine than a sewing machine, but it's still great at what it does. It was also quick to set up and easy to use...the hoslter below was stitched up in about 5 minutes start to finish, and it was my first use of the Boss. I do have experience with other machines, so I'm sure that played a part in things but see for yourself: