I've been using clickaider.com and google analytics for some time now and they work just great. I get good detailed statistics about my sites.
Yes its legal... no problem with adlogger but they stopped the development so no further upgrades... thats the only problem... otherwise its good and useful
I am about to try clickaider, one thing about adlogger if anyone want to try it clicks are only recorded for IE but not Gecko (mozilla/firefox) based browser and its actually due to a bug in IE that this happens ... I just hope clickaider knows of a work around for Gecko based browsers