Once upon a time, I decided I needed a treat and purchased a Nook Color. I found it handy for reading ebooks, took it with me on vacation when I wanted to be able to check email, etc. (I did not have a smart phone at the time), and of late purchased learning games for my g'daughter to play. It was the latter that drove me over the edge, Nookwise.
The primary issue is not being able to install purchased apps. This has happened repeatedly. Customer service recommends a soft reboot and/or archiving and unarchiving the offending app. These tactics have worked for me once or twice. Their next step is to unregister and reregister the Nook, which sounds too drastic to me. The last time I had this problem (this past week, in fact), the customer service rep tried to load the app on his Nook Color and it failed, which means, I guess, that the app is at fault. I received a refund, then I sent the developer an email: Are you going to fix this or not? No reply.
I decided some shopping was in order. After looking around online, I went to Best Buy (NOT because I was going to buy anything there, but because they are all stocked up for xmas and I could check things out; since it is pre-xmas, the sales staff is in assertive mode and practicing their spiels, so be forewarned). Nothing there appealed to me, especially the price tags, so I headed over to Barnes and Noble.
You might be wondering why I would consider another Nook after my experience with the Nook Color, but functionally and financially, that is what I wanted. And that is what I bought, this time the Samsung Galaxy Tab 4 Nook 7. It's like the Nook Color and my smart phone hooked up and produced an heir to the throne. The touch screen looks better and behaves better, it has more memory and is faster, and it weighs less than the Nook Color. Since both devices are registered with the same B&N account, there was no fooling around transferring purchases from one to the other. And best of all, now my g'daughter can play her learning games.