I have two and absolutely love them. I ahve owned Winchesters, Parker hales, Brownings, Rugers and I have handled a few Remingtons and I love the Tikka hands down. Even if the Tikkas were priced higher than the above mentioned rifles, I would still buy one.
I have a 22-250 Stainless Synthetic and a 7mm-08 blued synthetic. I have never adjusted or modified a thing on them. The 22-250 shoots cheapo Winchester ammo at sub MOA and myhandloads at about 3/8" @100. My 7mm-08 shoots factory ammo right around MOA and my handloads at about 1/2" @100. (haven't shot it much yet but got a nice 1.5" group at 300)
Both are scoped with Busnell Elite series, they are very light and can be carried all day.
If the hollow plastic sound bothers you, well than just remember they are made of hollow plastic! They are tough and you can always dump some spray foam down the stock.
I am considering putting a recoil reducer in my 7mm-08 just so my two rifles will feel exactly the same (recoil is very tolerable in the 7mm) and if I do, I will be spray foaming the stock.
Anyway, I woudn't hesitate to buy one and if you do and are not happy with one, it would be no trouble to sell it on here for a very small loss.