The Paratool has traveled everywhere with me, but it's dated and not as useful as many other multitools. It is nice and small and has the essential tools, and I have used the unique pliers at an angle, in tight spots. However, the tools don't lock, which can be a serious knuckle buster.
I was just looking at the PowerLock in the store last weekend, and was impressed. Their interlocking gear system, called "Compound Leverage" is smooth and easy to use, and helps it flip open. All the tools lock easily, too, and, like Patrick Hayes, I like the flip cover over the tools, too.
The downside is that while it is sturdy, it's not small or light. Due to these two reasons, I will continue to carry the Leatherman Wave, almost as tough and useful, in a smaller, lighter form factor. Also, if you're looking at the Powerlock, check out the Swisstool, too.
Welcome to CPF, Archvile!
daloosh