I used them a few years back and found them pretty good. At the time, I was attracted by the brand new planes for only a fraction more than the typical price for a 30 year old plane (price gap seems to haver grown now though).
On the downside, they have/had a policy of making GFPT pilots do their currency check every six weeks (regardless of flights done in that time) instead of the normal 3 months. For anyone planning to hold onto a GFPT, this is a real pain and a blatant grab for cash.