Free version is excellent, Pro is not very good

The free version is very good. It is more fun than processing your server logs on command line.

The Pro version is difficult to work with because it doesn’t have a search on the Tower. It also over whitelist many IPs that can be bad bots. I caught already a couple in less than one day. Also you cannot block useragents if they come under a proxy, the best you can do is copy and paste to something else that can block any useragent, like the excellent BBQ Pro. Manage on Tower sends you to the Tower but not the specific item, which you can’t find because no search on Tower.

But free version is very very good.