I just bought and set up a Tacx CycleForce One, in anticipation of the even more grisly Scottish winters. It works well enough and is solidly made, my more general comments would be;
Hate the bike you put in the trainer because trainers are not very kind to bikes. They stress the frame strangely (compared to road riding) and they shred the tyres pretty ruthlessly. (I've ordered the cheapest Raleigh, I'm fully expecting to hate that enough not to feel bad about the creaking from the frame ...)
Even with variation in the routine (interval training etc), you can expect to be a bit bored when training. I think I will be quite likely to want to [censored] rides out in any kind of suitable weather through the winter, because the trainer experience is way less fun that the 'real' thing.
You can get the Tacx i-Magic kind of 'virtual reality' type trainer which relates your pedalling to a screen with a choice of circuits (Mont Ventoux if you're mad ...). My partner has ordered one of these, so I can't tell you what the cost / benefit balance is on that. But it's fair to say it has to be less boring than a plain trainer, but its a LOT dearer.