I really prefer having a three cam unit in these sizes. It happens all the time that there is a shallow placement that works better (or at all) with the middle lobe pointed one way. Its a rare pitch that doesn't see a #3 placed. In these small sizes they fit in many more places than equivalent wild country friends.Only thing I don't like is the plastic sleeves on the side get beat up after awhile and there is no way according to metolius to fix them.

The Metolius Ultralight TCUs are light, easy to place for being microcams, and not as pricey as C3s. I have taken a fall on the 00 - not a huge fall but it held like a champ despite the 6+ kn rating. Also, I won't place an alien ever again after seeing CCH's response to their QC issues over the past year.

I love these cams, the three lobes make them great. The only con is that they are wide, but that has only affected one placement one time ever. over all awesome.

Carry most of these regularly on the gear rack, blue, yellow, orange. I've substituted the yellow C3 for the TCU as the C3 is a bit smaller and fits nicely between the blue TCU and the yellow Alien. Occasionally TCUs fit in places no other cam will. The smallest sizes are still handsome, well-made units, but I prefer a 4-cam unit when I can get one.

Let's get the negative out of the way. They are wider and less acceptable to side loading than CCH's Aliens. (Hence why I've got 3 aliens on my rack too). That said, I use these about 5 times more often than the aliens.

Why? Well, I climb mostly in the Sierra, and our cracks aren't that squirly. Almost always, I can throw in a TCU, and I rarely ever miss the sizeing, they jut seem to work. The color coding is intuitive and bright, the triggers work great.

I love everything about these, and don't think a rack is complete without 00-3.

Do note, as well, that 00 has somewhat a low strength rating, like all small trad pro.

best cams you can buy. period.

These things are TINY and light...I have not placed (the yellow) one yet but I am sure It will be just like the older heavier brother. Great cams for horizontals.

TCU's are classic small cams - great price and a solid cam. I'd prefer these over the Black Diamond C3's. The range finder is helpful, if you need it.

I use the three smallest sizes (00, 0, 1) instead of C3's. I love the light weight, and I think the trigger is a lot easier to use on such a small cam. I have big fingers, and it can be tough to place or clean small cams. The design allows cleaning by pulling on the trigger with a nut tool if needed. The cams hold well, though as with any very small cam there isn't a lot of surface area.

One of the best balances between cost and bomber construction and killer performance. If you place a TCU correctly it will hold your fall, just like all the rest.

I finally broke down and bought some famous TCUs. The TCUs are light, obviously high quality and have great range for each size. The action is smooth once you get the lobes past the little hang up/hesitation area. Maybe this will go away with more use? Overall, excellent cams from Metolius that I'm looking forward to placing for many years.