I have been using this for a while, and yes there a million pop-up ads and its a mess with tracking cookies.
On the other hand this toolbar is very convenient and I don't know how I can get by without it.
Until I find its equivalent or better I will keep using it.
With that being said, make sure you are protected!
I use noscript, adblockplus, and the usual anti-virus, firewall, and anti-spyware/malware.