I've tried both.........
For some reason the NO-IP client updates the DNS server with my new IP, but still looks for the old one. I've read the docs, and while it states that the update time is approx. 5 mins, I'm still waiting (~3hours).
The DNSart client on the other hand, updates almost instantaneously - so god knows whats going on. Well I'll guess I'll use that for now.
" Death is a punishment to some, to others a gift and to many a favour. " - Seneca