Low parts count.
Line goes in the bottom, so it makes a good grip.
Very consistent when clean. If you use a screw in tank, be careful to keep grit and dirt out of the ASA adapter - it doesn't take much to get in and the regulator will spike like crazy. Definately worth the cost. The Palmer Stabalizer comes close, but the side air inlet is awkward compared to the Glad. Nothing is perfect, so I can't give it a 10.