I recently decided to upgrade two of my three faucets to 650ss control flow.
My three tap keezer has been set up with two 525ss and one 630ss since I built it. Orginally, I was planning on a two tapper, but realized I had room for three even with my 10lb co2 tank inside....boom....ordered a third, but then heard kegconnection couldnt get anymore 525 and only had the new 630 or go ventmatic...decided to stay with Perlick.
When I first got the "odd man out 630", I was not a huge fan. The stamped P didnt look as nice as the scripted P on the 525's and the biggest thing it felt slightly loose and easy to move from on and off. But...over time I have noticed one big thing about the difference. When you shut off the 630, its like wham...I'm turned off. With the 525 it was like shutting off a normal faucet with a few extra drips and if you haven't clean the lines recently...it felt...like you were slightly pushing to get it to valve off. Don't get me wrong, love the 525, and I know they have discontinued and are no longer in production. But the on/off function of the 630 is superior after my initial hesitant reaction when I first received them. Another huge thing was the extra 1.2 inch distance away from the shank for those who use chest freezers without towers. The 630 gave plenty of clearance even for the longest tap handles, the 525, not so much (always barely knicking a tap open when I had to get inside to change a keg, etc.). So, I am glad to say, I have retired the 525 for 650's, keeping them for my 5 tap keezer when my little Kenmore decides to leave us. I will reinstall the 525's until I get the money, but...I'm hoping the 650's give me that control with the solidarity of the 630 and I dont have to worry about raising that keezer lid! I can shut those control flows off and never even blink an eye. Cheers.