I've never shot one, but hop over to m14tfl.com and you will read more than you ever need to know about them.
The price should be pretty good compared to other m14 makes. The recievers tend to be more in spec than Springfield m1a's, making mounting a scope some what more predictable and usgi parts should swap out fine with the OEM stuff. The bolts are supposedly soft and are often swapped out for USGI bolts, which i believe also calls for rebarrelling... Pretty much, they make a decent base for custom work if you want to have USGI barrel, bolt, oprod, etc installed on the Polytech reciever... So if you want to send it off to a smith to have it done up right, this is a good gun. If you want it to be a shooter as is, i'd probably pass. this is all just based on what i've read and you've probably seen these same things mentioned in your own research.
As far as accuracy goes, what kind of accuracy are you wanting? The m14/m1a is pretty much a 2 moa gun out of the box assuming the stock fits decent... and there are tons of things you can do to improve accuracy... bedding, custom stocks, several ebr chassis that are available, NM parts.. You can make them very accurate if you have the coin to drop on it, but it will never be as accurate as a tuned Remington 700.