there r several reviews on the net. since cnet is a standard, i consider their reviews good enuf too.
now take for instance the adware report link. it rates spydoc at top. cud not dispute that ! next in line at no 2 is max secure spyware detector. it is from a pune based company. my review is
here. zerospy, aluria (once a rogue anti-spy), stopzilla are among the top ten, while noteworthy misses are spybot, widowsdefender ... also i cud not find the link to their testing methodology ...
but then if all people agreed on all things, the world would be a dull place
so without getting personally involved in each issue i prefer to try to read all reviews and base my judgements on my/our personal experiences.