I own a couple of these. Nothing to say against them except that the U-stem (any U-stem-cam) in VERTICAL positions tends more to wander than single stems if rope drag occurs.

These cams are faster and easier to handle than WiCo's, that's true, and the extentable sling can be of some advance in certain situations.

So a mix of DMM and WiCo might be wise.

I use camalots, for the most part, as I'm a big fan of single stem cams. I've had a few bad experiences with U-stem cams, so I'm a little skittish. That said, I really prefer the trigger design (and trigger wire attachment) on 4CUs over what BD has to offer. These like to flop to one side (that is, all of the lobes will rotate such that the flat part of the lobes is about parallel to the stem) from time to time, which is frustrating on lead, but its not a deal killer. They are light, cheap, and awesome if you're trying to build up enough cams to go to the desert without borrowing too much. That's why I got them. The old 3.5 (I understand the numbers have changed, so I don't know what its called now) has basically the same range as a #3 camalot, which is handy. I could go either way on doubled slings, so I won't really comment on that.

These bad boys are awsome, the best Cams on the market IMHO. They're light weight, have a double length sling, and are inexpensive. What more could you ask for?

Strong, light, cheap, user friendly
what more can you ask for ?

Love these cams.....being that they are basically WC tech friends but lighter, easier to handle and have the extendable sling. I love the WC techs, but I love these more. Great value for excellent gear.