Hi Angel;
If it's 'service' that is the question then I have had good experiences, and bad ones with my Surface RT.
Bad? Well I bought my Surface RT at launch, indeed it was a pre-order. I had a terrible experience with the delivery of them repeatedly missing delivery dates, misleading people over what the delivery dates were, and in general being very unhelpful over the phone (and indeed, failing to properly fix problems with the Microsoft Store website that effectively locked out my Live account!).
Good? Well, My Surface recently broke down and refused to charge - so, I had to send it back. An excellent experience all round here. I didn't have to even call anyone - just submitted the item for repair on the Microsoft website, and then sent it back - they turned-around the replacement the same day, so all in all I was without my Surface for no more than 48 hours, no fuss, no hoops to jump through!
My initial bad experience can probably be chalked down to launch problems, and there will probably be plenty of people who've ordered a Surface from Microsoft who had no problems at all. No 'big company' is perfect, but if you are looking to choose a tablet, I wouldn't write Microsoft off - the product itself is going to be far more flexible than most other tablets on the market, and my experience of the service suggests that -provided you don't get caught by a 'glitch' (which could happen with any company) that you'll experience excellent quality of service.