hahaha guys, the ones listed are just either ball n' spring or needlevalve units, using slightly different parts from McMaster-Carr or some other valve parts vendor, and sold with some neoprene hose pieces and some zipties for three times what it cost the guy to make them.
Keith, stick with what you got. It's really just the same thing! If you don't want it ghetto, do what I did for a buddy and paint it a snazzy neon color or something. If you are having consistency issues, then you should try dissassembly and cleaning. Another common reason for MBC consistency issues, turbo spikes, and boost creep is both location of boost signal source and length of hoses. Otherwise a ball and spring valve is so simple it will always work if you maintain it and locate it on the wastegate properly. In fact it's foolproof. many quick and responsive cars use them.
BTW, building your own has the advantage of choice of parts (springs, valve bodies, adjustment methods such as knobs vs. twist bodies, etc.). If you don't like your particular setup, go with a different valve body that accepts a ball and spring configuration. Aain, McMaster-Carr has all that you need in their "Grainger" line-up. And I think Ace hardware carries plenty of stuffs to make these, too.
The TurboSmart/TurboXS comes in both Ball and Spring and simple needle valve. The one you show is the needle. Again, you're just paying for the name and some pretty annodized aluminum valve body. Also the pictured design uses valving that requires both a tiny screwdriver AND is ultra precise (read as tricky to work with).