Simple question... I'm planning to integrate live help to get instant feedback or answer question from my beta users... Do you recommend LiveZilla or oLark?
If you are expecting a relatively low chat volume but more than 20 conversations per month, you might find My Customer Cloud's (http://mycustomercloud.com) pay-per-use plan a good option. We also offer SMS chat in addition to website chat.
I highly recommend http://www.olark.com -- but I am biased. If you already use an IM program, it's hard to beat being able to monitor visitors right in your buddy list.
I've only used oLark, but I've been happy with them.