I use the bud sapphires almost religiously. I have a mixture of the sweet summer lemonade and strawberry in one right now actually. I've only had one of 8 give out on me so far. As far as clearomizers go I understand they are very simply constructed and I have personally seen how easy they are to disassemble and clean. Only issue I've had with them is that the wick has a tendency to get clogged after one or two fills which results in either having to clean them or put more effort into making sure the coil stays wet. I think the vapor production is pretty good, and I like the cool/smoothness of the vapor since it has to travel up the outside of the
tank section. Also flavor in these is phenomenal.
I haven't had any of the Vision cartos for long, I have a Stone and a 1.5 ml, both of which are ridiculously large. Honestly I won't take the Stone out of the house as I don't want to be suspected of using drug paraphernalia (as it does look rather suspicious.) Also on both my Stone and the 3.5ml Vision I've had the vapor start to feel burnt and when inspecting the coil, the wick inside the coil is already black. On the Stone it happened in less than half a tank and on the 3.5 it took a full tank. Now assuming that I can get both tasting good again and can figure out how to keep it from happening to future Visions, I do like the Vapor production (significantly higher than Bud Sapphire), and the ease of dis/assembly on the Stone is a godsend so i foresee no problems cleaning it.
Honestly I like both series so far. I would not be opposed to a different mini clearomizer as long as the ease of dis/assembly is at a minimum as easy as the Buds (I like to take things apart, also makes cleaning a lot easier). If you can find one that has equivalent/better vapor production than the Bud, equivalent flavor, and is easy to clean I'd grab it in a heartbeat. From what research I've done thats going to be a tall order.