The impression I have of my Foldaway model is pretty good (though I've still only done a pitiful number of miles!).
But a lot of things have come loose in the first um ... 40 miles. Including the spokes of the back wheel.
Yes, you may have to tweak a few things early on in the bike's life.
What you have to bear in mind, is that these 'good value' bikes have been made in some low rent factory, with some poor, even lower paid worker, assembling them.
Unlike cars, every nut and bolt is not torqued to a specification, and as someone quite rightly mentioned, the wheels are machine built.
Look past these facts and you will own a dependable bike with 1 year warranty, plenty of forum help if things do need tweaking, and the availability of spare batteries (for the near future at least)
And if everything does go t**ts up after a year, then you haven't really lost a great deal of cash