flown the GLEX and the falcon family at bit of G2/G3/G4 but not the G5/550 for the time being on a F2TH EASy
1st GLEX
Cabin comfort, good systems, CAMS improved, for private ideal nice to fly
2nd Gulstream
Nice cabin but too narrow, nice windows, "tube effect" 550 nice avionics but I believe it is still an american muscle car, nice on a straight line a nightmare in the turns....
3rd 7X
Cabin is TOO SMALL !!! it is the same width and height of a F2TH !!! a pure joke !! but 3 engines, no etops consideration, but in private who cares anyway. Nice avionics package but have to wait for phase 2.
If looking for something comfortable go for a BBJ...same price, a little bit more expensive to run but for private use it does not really matter does it ? The service is definitely there. Downside limited to FL410 where the others are in the quietness of the troposphere.....