I like it.
Been using it for a year and a half with an SBLive card. It allows 16-audio tracks plus all the MIDI tracks you could want. It has been pretty stable and entirely satisfactory for the niche products I record and sell.
The nifty deal is the Fretboard interface that lets you enter notes right off a picture of a neck, in any tuning you want.
Cakewalk is clearencing GS2 it for $99, you could probably get it cheaper from dealers. Or even free from your local upgrade-aholic.
Keep in mind, Pro Audio 9 is also out there for fairly cheap. PA9 includes all the Guitar Studio tools, inlcuding the fretboard thing and adds virtually unlimited audio tracks.
All the best to you.
Kevin