I like them, and have a bunch in reserve as well as 3 currently in rotation, one of the 3 has been in use for more than a month with no reduction in vapor production, and no cracking using dark, sweet juices (all chocolate variations), and that is the only LR I have - the rest are SR, and they work beautifully on my LTs.
The short wick does make chain vaping a little more difficult, but I rotate devices so it isn't a huge issue at this point (It was more of an issue when I was only using one kgo battery at a time). I don't have an issue with a stiff draw on the LTs, but on the kGo this was a problem. I know some people have solved this by using a dremel to increase the size of the notches on the bottom flange.
They are the easiest device to fill, just unscrew the top, drip your juice and screw the top back on. No muss, no fuss - quick and easy, and ready to vape in under a minute.
I have found that pre-soaking the Stardust in a 50/50 pg/vg mix prior to filling for the first time helps with the break in period, and also eliminates the initial plastic/chemical taste that they can give off in the beginning (ick).
I will buy them again, and am looking forward to trying the V2 with longer wicks.