We're in the process of moving to IPAM from spreadsheets. I've been using IPAM for years but getting everyone else around the country to do the same, is not easy. Most of the issue are around the layout of IPAM folders. I've setup folder with our few /16 ranges and under that I have /24 so that every single IP address in the /16 is checked. This is the same way the spreadsheets were set up (a tab for each /24).
But the issue is that some only want to see what they're responsible whether it's a /23, /24, /28 etc. And currently there are some IPAM folders with this kind of info in it for them but management of this is painful. So hopefully everything bar the /16's I setup will be deleted so that everyone is using the same view.
I like IPAM cause it populates itself but even so I still do a ping check before using an IP address just in case.