With any of these cheaper tablets it depends on what you are expecting and your level of IT experience.
Most of these will need a bit of fettling to get running well – maybe a flashed ROM or a script run to enable Google Play but nothing difficult if you follow instructions online.
If you are expecting an iPad/Galaxay Tab – but for a quarter of the price you will be disappointed but if you are willing to play around with it for an hour or two and do a bit of online research you can easily get a a very good tablet that’s capable of all basic tasks and run some games for a good price.