How legal are they? Not very, a few years ago there used to be loads more tab sites, www.mxtabs.com used to be very good for non-metal guitar music till it got shut down. I'm pretty sure a quarter of all the tabs submitted on the internet were lost when that happened and never recovered.

Basically, companies such as Sony were infuraited by the "copyright infringement" posed by tabbing, so had a load shut down. UG only survived because it's based in Russia.
Fender MIM Telecaster (w/SD Little '59)
Boss DS-1
Electro-Harmonix Little Big Muff
Digitech EX-7
Marshall Echohead
Fender Pro Junior