Hi,
Personnally, YES, it's too small (not small as some other ultra compacts (CASIO...) but very small, and buttons everywhere, so you can't find a place (if such as me you have big fingers) to put on the camera...
I resolved the problem by buying a SIGMA FLASH DG500 SUPER ETTL and OPTICS (converter, tele & wide angle...), so the camera isn't so small, but it's not really a big problem, but the older G series was terrible with the grip, I remember skiing while filming and shooting other pearsons WITH ONE HAND and LOOKING FRONT OF ME (thanks flip screen), the GRIP & SCREEN saved my life and my camera on hard snow tracks...
But the G7 is an excellent camera, if you accept to "little downgrade quality at 100% pixel view"...
The grip, you should use both hands for have a really good grip... and your fingers will go on the screen, it's well built and protected so there will be no problems... the shutter button is also 50% smallest than older cameras, but after adaptation time, it's very good & pleasant camera to use.
Cerdan.
Paris