In theory it should be enough. There's quite a bit of technical information missing on that product page. I couldn't help but notice the psu only comes with a one year warranty. A high quality, stable, reliable power supply should come with a five year warranty.
Not sure. It's been years since I risked a system on a no-name PSU like that. Trouble is, just about every competent technical review (e.g. jonnyguru, hardocp, hardwaresecrets) I've read on them features escaping magic blue smoke, some on as low as a 60% load.