A very good article on tablets and especially the following reference:
DIRT-CHEAP KNOCKOFFS You can find no-name tablets for $100 or even less. You can also find mystery-brand Chinese tablets in toy stores, marketed to children.
Don’t buy them. They don’t have the apps, the features, the polish or the pleasure of the nicer ones. The junk drawer is already calling their names.
I have had a Nexus 7 well over three months and highly delighted, apart from sharing saturated Wifi access points. Fortunately I console myself with reading an ebook