They're a very unusual hop and I think you'll either like them or hate them. I use them in a pale ale or bitter, late in the boil and at flameout where they give a sort of strange tropical edge to the beer. I'd suggest quite high attenuation and not too sweet a malt profile. Give them a try with a small batch. There are a few derivatives like Olicana and others. I think these hops have been bred to try to challenge the big American IPA hops, but they're in quite a different category, in my opinion.
Oh, I ferment mine with yeast harvested from Adnams and I like the beer. I've made a couple of batches now and have one lot conditioning.
Edit:
There's already a thread dealing with Jester, I think, although Jester might not be in the title. I recall that some contributors didn't like them at all.