Did it myself. I would suggest using labeled ziploc baggies and taking pics of the wiring, foam, etc at each step of dissasembly. The "complexity" is mostly in the manual, as it jumps all over the place. Some parts you spend almost as much time flipping pages as turning wrenches.
The savings on my first (and only so far) valve job bought an HF platform lift and various hand tools as well as paying me a bit for my time. The local dealer swapped some shims for free, but some I had to order, so the bike was up on the rack for about 2 weeks or so. Because of the time lag between start and finish, the baggies and pics are extremely helpful.
If you are not mechanically talented, this may not be the job to learn on, but it really isn't bad with a garage and a lift and proper tools. I'm just about coming up on time for another check. I'm not "looking forward" to it, but I'm not dreading it, either. In the 4.5 years I've had the bike and been on this forum, it seems rare for an owner to find all the valves in spec on the first check, and equally rare for dealers to find them out of spec. Anecdotal, yes, but that is a major reason I would prefer to do the work myself. I fully expect all the valves to be in spec, so it s/b much easier this time around.