One of my coworkers has a pair that I've used a few times. For snap ring pliers with interchangeable tips, I think its about the best one on the market. If you only encounter snap rings every once in awhile, and just want 1 pair of pliers to throw in your toolbag, its hard to choose a better pair than the Channellock ones. Way better than the $5 HF style interchangeable snap ring pliers.
I prefer the Knipex (or Knipex style) snap ring pliers with individual pliers for each type, but that's only if you have the luxury of keeping 8-16 individual snap ring pliers around (and the budget for them also).