The Mitsumi is great for PSX copies. However there are a couple of things you should know.

Firstly, it cannot copy Safedisc 2.

Second, the 4804 had problems with DiscJuggler, and needed patches, conversions to Nero and so on to get it to work.

To be honest there are better drives around these days for the same money as the Mitsumi. I'd recommend the Teac 58e, an 8x writer which is a steal at around 80 UKP inc VAT, about the same as the Mitsumi and a much better writer. Of course it cannot do SD2 either, but you can't have everything....