I've been using the xsleeve with the 14 oz weight for about 8 months, 12-16 hours a day every day. It makes a nice bulge down one leg and is beyond comfortable. I've tried other extender devices and they either cut off circulation, are painful/pinchy, or it creates an odd bulge. Once you figure out how far to roll it, it works nicely. And it's easy to roll/unroll, it's flexible, and it just is comfortable.
The 14 oz cap adds 2"+ to the bulge, but under loose pants it hides just fine. It usually hangs just below my boxers, and nearly hangs out my shorts, so during summer months it can be more issue.
(As with most extender devices, don't wear it to the airport. With moderate activity the weight can be pulled/snagged and snap back, causing either a painful pinch or tearing of the silicone. I've only tore one sleeve, but I was jumping over a guardrail and it got caught.)
http://www.autoextender.com/xleeve.html