Unless the cost is the overriding issue, I would pass on this and buy either a nicer MicroTek or an Epson. Although MicroTek produces some of the best scanners (professional and semi-professional), they went bottom feeding with the C Series scanners in an attempt to sell into the low end market. If you have a spare SCSI card, pick up an E6 or better off Ebay and you will be amazed at the quality. My wife uses a Scanmaker 4 in her home business. Both it and the E6 are built like tanks.
One positive about the C Series or any other Microtek scanner, MicroTek provides some of the best drivers in the industry. Very solid and trouble free.