I'm doing the 'expensive' Kriek (cherry) at the moment, see
here
I was 'lucky' to pick up a short dated kit from my LHBS, which |I wouldn't normally touch, but at a 33% discount I thought it would be worth a go. Apparently, it's all the cherries that make it so expensive.
We're not used to paying a £1 for each 500ml bottle in this game, but mine tasted mighty fine when I racked it to secondary.
The Abdij (£11-12 per 9L) is very tasty, although more bitter than the original beers it seeks to emulate, in my experience. I've got the Wheat and the Triple on the shelf.
They seem extremely good quality kits to me so far, with terrific yeast that does it jobs and then compacts beautifully to the bottom. Start accumulating a few Bud bottles or similar to put them in!