I found the XLAB after tiring of other seat cages that ejected my bottles like depth charges when I hit dips going through intersections. Riding in Arizona, we can easily drink 60 ounces of water on a 30 mile ride in summer, and this is a great way to take an extra bottle, including insulated Camelbak Podium 21s, which fit. I like the tight fit to keep my extra bottle in place over bumps. Regular uninsulated bottles fit a little less snugly - but still pretty snug. Relatively slimmer insulated bottles like the Podium 21 is very tight, but work. I also have a Speedfil 40 oz. tank system for primary drinking while pedaling. I use the XLAB Aero to carry Heed electrolyte replacement to drink at stoplights, or on a shorter/hotter ride, just water to dump on my head. The seat bag part of this rig holds a surprising amount of stuff, although an extra tube is very tight if you have many other tools. The hardware is very sturdy and adjusts to give you a range of angle and depth options. Once on, it's solid as a rock. Nothing rattling or wobbling. Assembly seemed intuitive. If I had one gripe (let's call it a suggestion, more accurately), is that a tab or loop for a rear light would be a nice addition. For technical comparison, I have this on a 54" Cervelo S1 (aero seat post), with a Cobb Delta M saddle.
I found SCC Slick in June of 2018. I had heard a lot of hype floating around the Salt Lake Valley, and I was really excited to try it out.
I put it on my bike and instantly could tell a difference. Then the longevity came into play. Later in the week I headed down to Moab to bike The White Rim trail. I could have ridden the whole trail in the middle of a dry dusty summer in one coating. I was blown away. It's now become a game to see how many miles one application can go.
I've been riding for almost 20 years, and I feel like I've tried the vast majority of chain lubes available. I won't put anything else on my bike. This is a game changer. My drivetrain is lasting longer, and my time spent on maintenance is now almost non-existent. Do yourself a favor and make the switch. You won't regret it.