The Good: Solid feel, fits nearly all chains
The Bad: Probably too big/overkill to take in your pack
You might be tempted to try and save a few bucks and use the little chain tool on your fancy multi-tool for home bike repairs, but this tool is much better. I am of the philosophy that the fewest times you have to replace pins and "brake" your chain, the less likely you are to have problems on the trail with it. Park's tool here gives you the best chance at keeping your chain in proper order and offers a big enough handle to transfer the nuances of pin pushing to your fingers. My favorite feature is that you can easily tweak any stiff links without resorting to the bend-the-chain technique.