I love this app, one of the first things I install immediately after a fresh install.
A must have tool for anybody intrested in computer security. Offers great variety of ways to scan a single or multiple hosts.
Service detection is correct 99% of the time and does what it should do perfectly. Best thing to use when diagnosing network security/issues on your LAN. Also a great addition to help finding trojans running on a windows computer, can fingerprint malware such as conficker etc. Top quality tool.