firstly, usually a 90W or even 70W will usually suffice when using mini-itx which consume very little power. Unless you have a number of full size HD's or CD drives.
Secondly i think that product has been discussed before, i think the general opinion was that it is a bit iffy. 200W produces quite a bit of heat and that PSU doesnt have a heatsink let alone a fan. The fact that its supplied with only one molex connector probably means its designed for only one device.
Just my opinion.