I purchased the Crank Brothers Pica multi-tool about 3 years ago so that I could have one on my road bike AND one on my mountain bike. As it turns out, I just move this one back and forth between bikes because I like it so much. After 3 years of use, this is what I have found:
Weight – It weighs in at 166g, which isnt too bad. Of course the Specialized multi-tool weighs less, but it does not include the wide range of allen and hex keys or a chain breaker.
Smooth – It is not uncommon for a multi-tool to rub a hole in your spare tube while it is in your saddlebag or pocket. A multi-tool with smooth edges reduces the risk of cutting or rubbing a hole in your spare tube.
Locking Mechanism – The locking mechanism of the tool makes sure that it does not open in your pocket. It also decreases the risk of smashing fingers while tightening or loosing bolts.
Chain Breaker – A chain breaker is one item you should carry during every race or ride. Never go on a long ride without a chain breaker. This one is well built and had worked fine. I use it in my home shop as well as out on the trail.
Solid Construction – This tool is built well. It will not rattle apart in your saddlebag or wear out after heavy use.
What’s Not Good:
Locking Mechanism – The locking mechanism makes the tool hard to use with thicker gloves or cold hands. It just makes it hard to get the desired tool exposed since they are tucked in so tight and secure.
Allen/Hex Key Length – The keys are relatively short. You may have to do ¼ turns at a time when adjusting your front/rear derailleur. I think this is the case with most multi-tools, but its worth noting.
No 10 or 12mm Hex Key – Most cranksets use a 10mm or 12mm hex. There is no way to tighten a crank arm if it comes loose on a ride.