The LG Optimus L7 managed to impress us with its sharp screen and the "floating mass" technology that pushes the display matrix close to the surface of the screen looked great.
The phone is pleasantly thin at 8.8mm, but the plastic of the back was pretty cheap and that ruined the good impression (the same goes for the 4X HD and the Vu too).
The LG Optimus L5 has similar underlying hardware to the Optimus L3. While the 800MHz processor is enough for an entry-level device like the L3, we noticed that the L5 lagged occasionally.
The Optimus L3 was pleasantly snappy for an entry-level device, with its 800MHz processor and low-res 3.2" screen.