I have a Topside and am very happy with it. All works just fine. The top fill cap is a joy to use, a 21700 great for battery life, and the bottle is comfy to squonk.. Drawbacks are it's a bit on the heavy side but feels good in the hand, and the bottle itself is proprietary, so stocking up is a good idea. Also if you want to clean the bottle really well you have to disassemble the whole bottle sled to get it out. Rumor mill is there may be a dual battery version coming up for release, but again, only a rumor.
And good morning Shiners! Happy Friday! (it is Friday, right?)