WD is not perfect - it's a fact - but I can say the same about any other piece of software.
I have tried almost every AV / IS / anti-exe / HIPS / sandbox etc. available and I see no added value in running them on my system as I know exactly what I am doing.
Funny fact - on my wife's laptop with W7 only MSE is running and I scan her system with multiple scanners once a year only to find some cookies so if you ask me I'll say that any 3rd party is obsolete if you have a minimum common sense.
And if you're happy clicker, then there is no suite which can protect you.
Peace brothers!