Well I guess you get what you pay for. A week ago I bought a Cambridge Sciences Starpad 7 from amazon, and what a disaster. Firstly the unit was obviously used (unsealed box, marks on screen etc) and it was faulty. Not good amazon!
There followed a whole bunch of issues getting my money back which I won't detail here. Anyway, I decided to go for the Samsung Tab 3 7" instead. Am I pleased I did! Apart from amazon (grrrrr) taking 48 hours for a next day delivery due to "processing errors", the wait was worth it. Works straight out if the box, great screen, additional apps from Samsung etc. I was dubious about the lack of memory, but I bunged in a 32gb class 10 microsd and I'm flying. Bluetooth built in is good (many cheaper tablets don't have this), and connection via my home wifi really fast (about twice the speed my wife's older android tablet seems to get).
Also, and one of the main reasons for getting a tablet, the BT Sports app worked 1st time with great picture quality. A couple of my friends have tried and failed to get this app to work on their Android tablets. No such issues with the Tab 3. Indeed, all the apps I've tried work great inluding bbc iplayer, tv catchup etc. Also, no issues with browser access to YouTube etc.
Very, very pleased and with recent big price reductions, good value for what you actually get. ie. Quality, reliability, support, battery life etc.