I have Jam Origin MIDI Guitar 2 and Fishman Tripleplay. I also owned the Tripleplay Connect, but didn't like having to use a USB cable between the guitar and computer (although it worked fine).
MIDI Guitar 2: It's pretty easy to setup and tracks well. I really like that it doesn't require any additional hardware - no special pickup installed on the guitar. However, you do have to use their software to connect to your DAW. Version 3 is supposed to have significant improvements and I look forward to trying it when it's released.
Tripleplay: Tracking seems better than MG2. You can use their software to setup/calibrate the pickup you have to install on your guitar, but the software doesn't have to be running to connect to your DAW.
I've used both with Cubase, Digital Performer, and Sonar/Cakewalk on Windows with no problems. Both of those work well with Guitar Pro as an input source to create sheet music and tabs.