Their aluminum electrolytics have great specs and low cost. I suppose it remains to be seen how things will pan out in the long term - sometimes, certain wet Al capacitor types have proven to fail prematurely because of impurities in the foil or electrolyte, but that failure mode requires a year or more to manifest, so we won't know for a while.
I hope they prove to be as reliable as the 'known good' types like Panasonic, UCC, Nichicon and a few others, but again, it's too soon to know for sure. A friend has used some for some non-critical applications and they do work well, so they are promising IMHO and worth using for applications where it's easy to swap them out if they fail prematurely.