as per its portability its awesome as u cn play almost evry game of PS2 in it,evn few Ps3 with lower quality on PSP which is in ur pocket ... n abt UMD ... u dont need to buy UMD , jst install a custom firmware (frm saddar or by self thru PANDORA BAttery) thn Download ISO,CSO games thru torrents n copy thm to PSP....n here it go
secondly m using 8GB Mem card on my PSP , n it works perfectly fine !
I think PSP worth it !