Had the scanner for years took quite a while to get to grips with the Silverfast software which isn't very intuitive. I got good results from the scanner once I had this semi mastered. Using Vuescan also an option if you found that hard to work with.
So why did I let it go? Replaced a power supply that failed, never had any issues with it bar this. To do this I phoned up Plustek and spoke to a guy. At the time I was using Windows 7 64 bit and asked him why Plustek wasn't providing drivers for newer operating systems. He laughed at me and asked why I was using such an old scanner. My response was I was happy with it and it was working perfectly well for what I wanted it for (leaving the power supply part out of it). He then blamed Microsoft for coming out with newer operating systems.
Reality is decent companies update their drivers. The newer models did have the LED light v the bulb which I had not had a problem with, possibly some improvement in dynamic range. I didn't see a lot of reason to upgrade, if it's doing what you want why? Also the cost had risen hugely since I bought the 7200i, to get a comparable model would have been double the cost near enough. Once the power supply arrived I checked it worked, boxed it up and sold it on ebay (got a fair price cannot complain). I put the cash towards and Epson V550 and I'm happy with the scanner, better dynamic range and the software is easier to use.
Lesson to learn here is...well never laugh at a customer. I'll likely never buy another Plustek scanner ever again..because they don't support their products with driver updates