I'll echo DrMekon's thoughts on hand grinders. I haven't touched my Porlex since I got my Iberital a coupla weeks ago. The Porlex takes ages to do a large espresso, hence replacing it.
To answer your question, it's a conical burr grinder, so should be OK. The key to the whole thing is the grind consistency, which seems to be set by the gnarled nut. What brewing method are you using? Your grains seem too large for espresso, but it's hard to be sure from the pic. One tip would be to fill the bean reservoir to the top and not just what you need for one brew. That will allow gravity to apply a little more pressure on the beans about to be ground and stop some of them flying around. Put what you don't use back into a sealed container though.