I had a Nook 1st gen, that was the buggiest.
I had a Nook ST. This was rock solid. Never crashed, never page skipped, great battery.
The Glo is buggier than the Nook ST (occasional pages skipped, sometimes it goes into highlighting mode and I need to shut it down to recover, etc.) but better than the Nook 1st gen. And I can live with these problems.
The front light, better font adjustments and the better resolution made me move from Nook to Kobo. So far I don't regret it, I've had it for two and a bit months and I read daily.