In fact that's totally wrong. Iste has a negative conatation, when you use it alone or before a noun. When you say 'vir iste', iste can be neutral. But 'vir' has always a positive connotation, otherwise you have to use 'homo', which can be positive or negative or neutral.
In fact you don't have the 'some' in your translation.
If you learnt Latin in some school, if I were you, I would ask my money back!
For those who want to talk Latin, buy H. Menge, Repetitorium der lateinischen Sprache. It's still the best book available to learn to speak Latin verry correct and at a high level. But the only thing that's terrifying about it, is that's it's in German.
But still really good.