I've just watched it. Really enjoyed it, and now I kinda see what they're trying to do with the show.
You have the proper Top Gear that carries on where the old one left off: There's never going to be anything special there, nor any real meat for the proper petrolheads. That's where Extra Gear comes in IMHO. They can be more relaxed, less arty, more geeky, and slightly less concerned about making the big bucks. Rory is a natural in front of the camera, I'd expect to see him do some stuff for the proper show really soon, he's excellent. Harris is also brilliant as he's proved on his own stuff, here however he came across as a bit of an idiot and I can see people not really taking to him if they continue to edit him like that. However, the EG stuff itself was interesting, funny, clever and intelligently shot, proving they've got a very good team behind the scenes.
This is kinda what I always hoped TG would be, both entertaining and geeky. They've had to split it into two shows to do it, but I can now see exactly how they're trying to move the show forward. I'd say EG is as much a must-see as TG itself is.