Ghost-
MS DHCP is weak at best and for a production network with paying customers, I would not use it. The QIP I recommended is an industrial strength DHCP which provides a good many things like concurrent running DHCP servers for hot standby, SQL database of all IPs, report generation, automatic address recovery and so on. It's NOT for the small office network, maybe for a medium network and in my opinion something like QIP is a requirement for stable DHCP in a large enterprise network.
Everyone will have a different opinion and this is just my opinion ;-) doest mean it's a stone cold fact.
Mike S
"Diplomacy; the art of saying 'nice doggie' till you can find a rock" Wynn Catlin