TT has been fine for me as well for a number of years, and like Eric when I've had a problem the forum got it sorted and I've only had one big issue in all this time. It was sorted with an engineer visit who fixed the OR problem at the cab. My sister-in-law and niece are also TT customers and they have not had problems wither, they have been TT customers longer than me, in fact it was them that got me to switch.
If you decide to swap it is probably worth a call to ask about it and whatever they offer you get it in an email so you can chase it later in case it goes awry.
Stuart