We used them when we AI'd our maiden JA pony with Tiny Tim and they were first class both in their liaison with me and the vet. I'd highly recommend them from my experience.
They are fab - 5 of my 6 come from there (4 homebreds and 1 punt!)
Not so keen on Odysseus lines as they are quite quirky (though my little 15.1hh Odysseus mare went on to intermediate event, but would occasionally get eliminated in the dressage if she wasn't going to play ball!)
My horse of a lifestime is by Pouchka, and his full brother, whilst not so talented on the SJ front is a very nice person to own!
The stud themselves are lovely people and highly recommended. To get my mare in foal I just had to box 20 mins up to road 3 times, all very good!!
If you want nice level headed horses they are definitely the place to go, and if I were looking for another one, I'd simply go and buy one of their youngsters!
Just to add this years foal was by Picasso, and I am putting the mare to Paper Moon this year, so my Alvescot numbers will grow... just got to keep my away from their babies for sale when I go up there!