[Myka]

I use both styles. I like the "big grab" style of the Coralife ones for most use and aquascaping (they are strong enough to hold a good-sized rock, and the "small grab" style of the Eheim ones for finicky work like frag placement.

EDIT: To prevent them from getting stuck closed, rinse them in fresh water after use (dip the tong end in your RO tub for quick and easy). Before I use mine I always open and close them a few times too so they get into working order.