Removing the link is almost effortless. But installing a link requires some serious force. If I were in charge of the design, I'd make the handles a couple inches longer to increase your leverage.
The value is pretty good. Some Park tools are incredibly overpriced but these hit the mark. There are some slightly less expensive pliers available. But I went with Park because I can trust the quality and, well, it matches my other Park stuff.
If you have a masterlink in your chain, then you need these. So much easier than grabbing the chain with your hands and trying to wiggle the link to release. Keep your hands clean and your chain from getting torqued.
I always clean my chains off the bike. Pull the dirty one off, put it in the soup for a few days, and put a clean spare on. I had been using a vicegrips to open the master link. The 11 speed chains are way hard to open by hand. The tool takes the fuss out of opening the master link, and doesn't offer the threat of damage .That vicegrips approach seemed prone to damaging things.
I finally woke up to the fact that master link chains have evolved since I was a kid, and are competitive with rivet chains in quality and are much quicker to install, and can be removed and cleaned making them long lasting. It took me a little longer to wake up to the fact that this specialized tool makes the process much, much easier. Don't be like me, if you are using master link chains make your life easier and buy this tool.