Anybody ever tried these? I heard they are similar to senko's.

I bought a few packs on clearance at bass pro a few years ago but never really tried them out. I believe that they are similar to Senkos and if I ever get around to using them, I will probably fish it weightless or on a shakey head

They're similar to a Senko but they make a good T-rig bait to peg and toss into heavy cover. They're a good C-rig bait too. 

They have a narrower taper and I think there are ridges on the body. I've used them for years and had no more or less success that I could notice compared to other brands. I have full confidence and if I weren't allowed to ever use a Senko again, it wouldn't bother me at all to stick with Z-nails.