People suggest it because it works and if you use that and HCG, you can then use Post Cycle/Unleashed after, therefore you don't NEED to use more drugs like clomid/nolvadex - rather than adding more drugs to the mix use natural compounds (apart from HCG. Some people use clomid but only at low dose ie 25mg a day
hcgen is a hell of a product. But I wouldn't ever NOT use a serm in my pct. It's not like they are expensive are hard to get a hold of. Check out ag guys.