My first impressions:
1. Level of customer service - SUPERB. I had constant emails from Doug Fisher regarding confirmation of choice/alternatives as well as shipping info. Doug replied to emails VERY promptly and this helps to instill confidence in his product.
2. Quality of product - SUPERB. The Epson film holder is absolute rubbish by comparison. There is no flex and the holder is weighty enough to ensure that it will stay put. The mounting station comes with a hex key (to adjust the height of the holder above scannner platen) as well as a set of comprehensive instructions. I ordered the Wet/dry option which comes with a sheet of Anti-Newton Glass. The station also comes with a set of black plastic sheets to use to make templates for film formats to be used. There are about 20 downloads on the Betterscanning website that cover most formats, including 6x12, 6x17 (cropped and open), as well as 5x4 masks, again cropped slightly as per the Epson holder and with a slightly larger aperture to allow full frame/rebate of 5x4 sheet to be scanned. I ordered additional/spare sheets too - about 30cents each!
3. Ease of use - well I managed it

4. Results - better than the Epson holder. I say "better" in as much as the variable height allows a much finer degree of variation in height than the Epson. I found the "sweet" spot with the mounting station and compared it with results from scans made with the Epson holder (an additional 45 minutes) and there is a noticeable difference between "best" Epson and "best" mounting station. To be fair the Epson 5x4 holder does a good job of holding the film flat in the gate but a real improvement was noticed when I taped a 6x17 transparency to the anti-newton glass. The film is held absolutely flat - unlike the Epson 120 roll film holder where there are clear ripples in the film. The real benefit, I imagine is if I ever decide to wet mount. The Betterscanning system would appear to be much easier and less messy to use than other methods?
5. Rating - 10/10.