1) Are they bad feeders?
2) What are there cage requirements?
3) Would you reccomend them for relativly inexperienced keepers?
1) They vary, I've seen shockers and also really good ones. It's not uncommon for them to be really difficult to get onto mice, but the usually assist feed relatively well.
2) Pretty standard for a medium sized arboreal snake. They like to climb but some people keep them without any climbing branches and they are still happy, healthy and breed. In my experience they have seemed to need high humidity for sloughing.
3) Not really, but it's up to you.
They usually don't manage to envenomate you, but it can happen. I've been envenomated by a newly hatched one, before its first feed (which I found quite suprising), syptoms were mild local itching and burning. I assume larger individuals could give you a slightly nastier reaction, but I don't really know much about it. I vaguely remember reading about their venom properties giving them very different effects to different animals, I believe they are not very nasty at all to placental mammals (which humans are part of) but much more deadly to marsupials (I'm not 100% sure on this, don't quote me on it). This may explain the kangaroo death bigguy mentioned. I've never heard of a human being significantly affected, but this certainly doesn't mean it hasn't happened.
Their temperaments vary hugely. I've seen many wild animals which have been completely tame and also some captive bred animals which have been quite nasty. It's not at all uncommon for them to be very good handlers, but it's also not uncommon for them to be unhandlable.