The graphics are great on the PSP and the sound isn't bad either. However, some of the controls are somewhat awkward.
Gameplay: Some of the mechanics, such as performing a drive-by and aiming/shooting a gun can feel weird sometimes. The lock-on system isn't exactly the best, but it works most of the time. Trying to attempt a drive-by is just a hit or miss most of the time though.
Graphics: Liberty City Stories has some of the best graphics that I've seen on the PSP system.
Sound: The sound in LCS is good, although some vehicles use the same sounds as other vehicles.
Value: A very good value considering that it can be found under Greatest Hits.