Scentlok and Scentblocker are the same product with different names. I do think they may help control human scent, but you still need to take the normal scent control measures that you would take without the suit. I use them, but I still shower before each hunt when possible, use unscented soap and scent neutralizers, and ALWAYS hunt with the wind in your favor.
The stories that I have heard about being upwind of deer without them detecting you on a regular basis is crap. It just hasnt happend with me.
Thats just my opinion, I am sure that there are some that will disagree.

hc4runner
MO. bowhunter