Here I am not going too endorse the DQ0 as I do not have one. But for those years I missed not having a previous model from Sigma I decided to get the Merrills, of which there is also plenty of negativity. Have to say I wished I had not listened too the negativity and got the Merrills or previous camera a lot sooner, as I have subsequently had a lot of enjoyment.
Yes they have their quirks and sometimes results are disappointing. Truth is the most disappointing camera I have ever purchased is a Sony, which everyone raved about at the time, t works both ways.
If I had the funds to justify adding another camera to the many I have I'd not hesitate to acquire the DP0Q tomorrow. Ive seen enough DP01 2 &3 images to see it is a very decent imaging machine and the lens on the DP0 seems superb, I know if I wanted a decent 21mm lens as the Dp0 has, it would cost far more than this whole kit.