Sad thing, yeah.
I already had 4 freezes after updating to 2.1.5., and worse than that, the battery completely drained twice in a few hours time. My Glo was practically unusable.
I did a factory reset, let the device update again.
Already had one freeze after that, but the battery seems ok now (too early too tell).
Does anyone have any tips? Should I remove the SD card and only use the main memory?
That would be a disappointment, because my main reason for switching from Kindle to Kobo was the support of memory cards.
When everything works (and it did the first two days) it is a super machine though.