Percys adjust-a-jet,what do you guys think?

Holley has had the Adjust-a-jet system out for quite awhile. Not sure if Percy's is any different. Haven't had any experience with it but it looks interesting. Holley's are great carbs when tuned properly but the couple I've ran seem to have been touchy on the weather swings. Sure would be nice to be able to just turn a screw to change the jetting instead of yanking everything apart. As far as it working on a street/strip setup I don't see why not. The kit # PHP-15001 says it's for a Street/strip Holley 2300/3310/4150/4160/4150hp. I'd like to get the setup and will if I get the money ahead to do so.