If you don't need the A4 function then that looks excellent. It would be useful to know what the DPIs are - sadly in the "technical spec" they don't give the most relevant statistic... unless it's somewhere else on the page and I've missed it. The fact that it's so small is great.
I got something modestly called the Epson Perfection 4490 Photo for £99 from Jessops, does the job really well and does normal A4 scanning too. it's simply an A4 scanner but with good enough resolution for slides. The resolution is better than necessary for any of the pics I've put through it, which were all taken with various Nikons and Hasselblads. If you zoom in you see the grain of the film long before the pixilation. If the Ion has that good a resolution then I'd say go for it.
