I have used this product (Colorvision PrintFix Pro + Spyder Pro) for a long time and I am very happy with the result. I generated many ICC profiles for color printing on R2400 et R1800 and IMHO they are good. I also intensively use their colormeter (densitometer) for measuring densities and creating B/W ICC profiles for adapting and proofing Epson ABW engine.
I must say that I am very pleased with the level of support provided by the folks at Colorvision. They are very responsive to all queries. Nice, nice, nice! In the past, I had problems with one of their products (concerning supported printer) and I have nothing negative to say about their support: it was really good.
(skip the remaining of my posting if you don't want criticisms about Gretag client support)
I have heard that there are probably better and more expensive products such as X-rite (the company that also bought Gretag) but their responsiveness prevents me from buying their products. Along the years, I have never had any reply from them when asking for dealers in Switzerland (neither from Gretag in the past or from X-rite today). When I said "no reply", it _is_ "no reply" at all. I have read in some forums that they apparently treat you like s... (you know what I mean) if you are not ready spending many thousands of $$$ in their products. I have never understood their way of acting since I was ready spending 1000$-2000$ in their products. I have been disgusted, so I gave up. If in my company we had treated our potential clients the way Gretag and X-Rite did with me, my company would have been down a long time ago.
I am not affiliated at all with Colorvision. All what I wrote is IMHO of course.