I started with the Ego-T, had no big issues, the atties do get clogged up as someone said but it's all a matter of keeping them clean. Since I switched to the 510-t, I found a big difference, this is a real vape with the convenience of a tank. The tanks are smaller, but no big deal to fill. The batteries are weak, so if you vape heavily you may want to get extra ones. I have 2 full kits and that gives me 4 batteries, that's over 1000 mah altogether which is quite a bit. I only need to bring 2 to work although i don't vape steady there, when I'm home I just keep them charged with the usb charger.
Anyway, my ego-t atties are in a box which is where they will stay. I tried vaping one of them the other day just to remind me of how bad they are and they truly are disgusting compared to the 510-t. As far as cleaning the 510-t atties, I just blow them out once every few days and then do a little dry burn on them and that works great. I've found that cleaning them with anything, even water, messes them up and if you have messed up atties you've probably done this.
I'm not even interested in trying another atty, at least until they come up with something better in a tank that's also this small