Canon CanoScan 5200F
This model is well-thought-out in terms of ergonomics and is easy to use. Separately, the developer should be praised for the ‘quick scan’ buttons functionality and simplicity of their reprogramming to your own needs. As to the slide adapter, it would be great, of course, to see its capacities to scan medium format film, but the available features are quite enough for wide range of consumers (by far a 35-mm films frame will suffice for mass user). Check this for Canon CanoScan 5200F scanner driver.
 
I also liked proprietary software very much, the functionality of which I would estimate as alpha plus! Canon programmers have implemented, perhaps, absolutely everything that may be needed for image settings. And, of course, FARE Level 2 dust handling technology is, without a doubt, the special feature due to which CanoScan 5200F will be snapped up! Moreover, the cost of the device is pretty saleable. 
If you want a fast scanner that does not warm the lamp for long before each scan, which is fairly quiet and unpretentious, which will help save time for scans post-processing, which digitizes the originals of any complexity with high quality, which … In general, Canon CanoScan 5200F is the model that you’ve been looking for for so long!