I'm a happy owner of a Suhr Modern GG, with some custom variations. (Different color scheme, removed the Tremol-no)
I also have a Suhr Pro S3 that I also like as much, IMHO Suhr is among the top guitar makers in the world, who's the best is a matter of taste.
Regarding the trem, it as easy/difficult as restringing a standard fender trem. Actually a bit easier due to the locking tuners.
I usually change one sting at a time, but when I do a bigger maintenance, I usually put a piece of wood or something to block the trem jsut to save me a bit of winding...