Judging colour is a difficult task at the best of times. However, the overall tone of the scan made from the negative looks a little under-saturated. Nevertheless, it is easy to compensate for this in the majority of photo editing suites as well as through the Epson driver.
This montage shows the level of definition you can expect from this scanner when it is used to scan from colour negatives. Pic b. is a scan of a professional print made from the same negative. Ignoring the differences in colour stauration, the 3170 shows that it can capture a decent level of detail especially when you consider the rather small 35mm scan area.
This is a postive scan from a transparency/slide. Granted, this is a small version of the full scan, but it does give you an indication of the detail captured and the colour accuracy. The insert shows the quality of the scan at 100% resolution (ie. 3,200dpi). You can notice some fuzziness, but like the negative scans this is still a commendable result from such a small original.