First the disclaimers:
I'm new to vaping.
With that said...
I've been using the Clearomizers since I got my GLV2 5V Thursday and I'm enjoying it (yes, that new) and not having a problem. I've seen where others are saying to not train vape them though, which I'm not. They put out enough for me to just take a quick few second puff on them that I don't need to go any longer. I actually am preferring them over the atty and carts because of this. I have to take a longer draw on the cartridges to get the same amount of vapor. I have the 3.2 ohm clearomizers, the only time they taste burnt is if I hit them too long or if I don't let them cool for few moments (just about 5 seconds or so) between hits, but I don't mind, it makes me slow down and not smoke it as much.
oh and I read somewhere it's not so much letting them cool as letting the wick catch up with the juice, but I'm not sure if that's the technical reason or not.