First things first: thank you for this functional and customizable plugin. So far it works pretty well and if you know where to put the code snippet in your theme, it can be positioned pretty much anywhere.
Maybe you can add a few information to your discription. Like that you store the data inside a table of the wordpress database (not sending stuff somewhere it doesn't belong). Befor installation it might also be interesting to know, which type of data you are going to store.
Especially saving the full IP and HOST are in my eyes not needed - correct me if I am wrong, but you shouldn't store more data than necessary.