I've been using the GP-E2 for a couple days now, and it's been pretty great!
It's handled some tough shots, like:
Random Industrial Building by
RyanCrierie, on Flickr
Taken from inside a speeding school bus -- the GP-E2 successfully logged the location right away, despite it not having a full view of the sky inside a metallic vehicle.
Another shot was this one:
Cross Street Market Seafood Bar #1 by
RyanCrierie, on Flickr
Taken inside the City Street Market in Baltimore, MD. The GP-E2 successfully logged the correctish location inside the market, despite having very little sky view at all.
You can see the uncorrected GPS Lat/long coordinates if you click on the "map" area in flickr.
It's literally turn on and shoot right away and compared to my other GPS gadgets:
A.) Garmin Nuvi Car GPS from 2008 -- the Garmin requires 40~ seconds or more to lock onto a satellite after a cold start; whereas the GP-E2 locks on virtually instantly.
B.) GPS in my Acer A200 Tablet -- it doesn't work inside a vehicle or inside buildings. Meanwhile, the GP-E2 can lock on even in such degraded conditions, such as the City Street Market's interior.