I've been waxing chains for a while and there's nothing like it for a clean smooth running chain. The drawbacks are needing the equipment and taking the time to do it properly. Reducing the number of times you need to rewax a chain is an obvious advantage. It definitely increases the longevity, but is it 3X? Perhaps not but that might dependent on your riding (Gravel versus Road, fair weather only or lots of riding in rain). I wax multiple chains at a time so I can put a fresh chain on the bike and set the old one aside until they both need fresh wax, that alone reduces the number of times I have to cook the chains by 1/2. The Endurance Chip means I'll need to do that even less.
I have tried other detachable rear fenders and this was the most well designed because the parts that attach to the seat-post are very strong and the actual fender material is extremely thin and light. Since it is deflecting rain and mud etc., it is sturdy enough for those sorts of things.
The other thing that I like about this fender is that it does not shift around all the time like other detachable fenders. I think because it is made of very light thin material, if the bike gets a lot of torque left or right, the fender hangs on the seat-post better because it has very low mass.
My 1st real floor pump has lasted 25yrs and is still going strong, but it was time to get a 2nd floor pump which I decided on a Lezyne Sport Floor Drive pump and upgraded it with LEZYNE PRESTA PRO FLOOR PUMP HEAD. The LEZYNE PRESTA PRO FLOOR PUMP HEAD makes easy work of pumping a tire with a presta valve. Easy to mount, blended excess air, and remove without applying stress to the valve or stem. Simple to use and a secure seal, you can't ask for much more. It's a great match with the Leyzne Sport Floor drive pump.
This stuff is really strong. It does work as you'd expect it to.
I have two minor gripes, though. First, it will leave scratches on whatever part you spread it on (e.g., the seat post) everytime you slide the part in and out. The scratched side is typically hidden anyway, so it doesn't usually matter too much, but it's something to be wary of.
Secondly, I wish this compound was available in a smaller-sized tube at a lower price, because I think it'll end up being a lifetime supply for me based on my rare, small uses of it.
