We have had overwhelming positive feedback of the quality of our profiles. Here are a few specific comments.

The custom profile renders prints very neutral (there is a slight
yellow cast with the Epson profile), and a little bit brighter (prints
with the Epson profile look a bit muddy).

Thank you for providing such an efficient and reasonably priced
serviced.

Your profile resolves more fine detail in dark details, ie black suits and
black lacy ladies dresses.Skin tones are more natural, and overall definition
is improved.

I've just started to use the new profiles and I can see a small but
noticeable improvement, especially in areas of subtle colouration, skin
tones are looking more natural.

I have to take my hat off to you – the profiles are really superb.

http://forums.dpreview.com/forums/read.asp?forum=1003&message=17341033