Although a great value compared to Perlicks, these can gum up and stick. I used some on a kegerator, and needed to upgrade after a month or two. However, for limited use things, like a travel setup, they work. I used them for a tap board for a wedding that I attached to kegs sitting in a bucket of ice. I then reused them for a birthday party, with commercial kegs (We were out of homebrew). The first pour or two was gummy, but then they were fine for the rest of the party.
They work for my needs, but I like my Perlicks better.
I built a portable keggerator that only comes out once or twice a year. I have Perlicks on my main keggerator, but decided to save some money on the portable version. These do the job for a few days when I'm camping or having a party and then they get cleaned and go back into storage. If they were on my main keggerator, they would get stuck when days would pass between pours and they would get a worse review from me. For what I use them for, they fit the bill.