PIPER CHEROKEE 180

I was interested in information about the 180. It seems to have a high usefull load compared to a 172. I fly a 172 at the local FBO and it can haul my family but no baggage. Is it a constant speed prop or a fixed pitch? Does is drop like a rock and easy to land or not? Is it stable in flight to do IFR training? Just a few questions I need an opinion on.