Hi!
I bought my Onyx Boox i62HD from ereader-store [1] and I'm very very happy with my purchase. Booxtor, from ereader-store, is an active user in this forum, and usually participates helping the users and providing firmware updates. In fact, he provided a new update some days ago and is working in a new one with more new features, like multitasking.
About the quality, I think it's good. The screen is HD, and has a very good contrast and resolution, and the touch screen is very responsive. I doesn't look or feel cheapish (I don't know a good word in English, but I hope you understand what I mean. It looks robust). About freezing, it used to freeze sometimes but I think that from the last firmware updates that has improved. And yes, you can connect to the Internet, but in my experience an eink reader is not the better device to surf. However, wifi is nice to check the email or download files from Dropbox, for example.
Another thing to highlight would be the capabilities for reading pdf, to crop margins, read multicolumn pdfs... Really good!
Hope that helps.
[1]
http://ereader-store.de/en/onyx-boox...oft-touch.html