I have one and is very good for 120, but is not that great for 35. You can get good scans if you try hard and develop a good technique. The 4490 has the same capability as the 500 and 600.
The real resolution sits at about 1800 dpi, so scanning for 13x19 inch prints may be a bit of a stretch. 8x10 or 8x12 will be perfectly ok.
I have (recently) done some wet-mounts and it is proving to be promising. ymmv.
You will definitely get the best bang for the buck with this unit.