I'm using:
Pureology ReconstructRepair (moderate protein)
Pureology Restorative Hair Treatment (moderate protein + moisture)
Cathy Howse Conditioner (mild to moderate protein)
Original Aussie 3 Minute Miracle (mild protein + moisture)
Mane N' Tail Hair Strengthener (spray leave-in, mild protein + moisture)
I use Keraphix (Nexxus)
I use it but really don't feel the need to. My hair requires more moisture than protein. Do you use heat or color?
My hair doesn't really like protein. But when I do need it, I usually use 1 egg/1 tsp. lemon juice/2 tbs. Mayo. I leave that on for an hour w/ a plastic cap.
The last protein treatment I did, I henna'd. It wasn't as messy as I thought it would be, and it was very beneficial, so I'll be using it again.
ETA: I've also used Africa's Best Hair Mayo before. For me, it didn't do to well on it's own, so I added an egg to it, and that seemed to do the trick.