On the Conitec home page they proudly link to an image of their ISO 9001:2000 certificate.
And ISO 9001 certification isn't a measure of quality value, it a measure of quallity consistency.Regardless, which product you use depends on which needs you have. Blitz3D has suited my needs fine for the last couple of years, to such a degree that I haven't felt the need to even look at other markets.