I've used the plastic version of the Park Chain Cleaner a lot, and it eventually started coming apart. I got this aluminum version to replace it.
This aluminum version feels like it will last forever, but it's a little different from the plastic design. The design difference means that the foam cleaning pads do not stay put as well as they do in the plastic version. Also this one has fabric pads on the chain exit section of the cleaner. They seem to do a good job as a final polish stage but may need to be replaced more often as it's not easy to clean these pads after cleaning the chain.
I've had 3 or more various plastic models and wanted to stop replacing them when they broke. This is pricey but I think will be worth it. It works well. One of the pads falls out and will need to be replaced soon, but that's not a big deal.
It left the chain really really clean. I used it with the Park chain cleaner liquid. The combination is great. The cleaner itself being metal makes it super sturdy. A must for the DIY mechanic.
I bought this scrubber to replace the plastic Park Tool scrubber which broke. This is much nicer to user, and makes the whole process faster. Because of much tighter tolerances, I am less likely to spill cleaning liquid and cleaning the workplace after cleaning the chain is also much easier.