Replaced my Toshiba 32WLT66 with this a week ago. Prior to buying it I read several reviews, and subscribed to "Which" - Panasonics are generally highly rated there. Set up was easy, and the difference is impressive. Both picture and especially sound are, as I'd hoped, much better. 1080P is definitely better than 1080i, and I can see and hear the difference. But I'm only comparing two models, and the Toshiba 32WLT66 is obsolete, and the equivalent only costs £364, so not really apples for apples. However, the improvement is marked, and particularly noticeable for Ps3 games. Details previously unseen and unheard come to life.
Only reason I didn't give this a 5 - There are 3 HDMI ports. One at the side, and two facing directly out of the back. The issue is that I hang the TV on a wall. Heavy duty HDMI cables cannot be fitted to the ports on the back of the TV, because there isn't enough room for the cable to bend, and my bracket only leaves 3/4". The Toshiba's ports pointed down - no issue with a wall getting in the way. So, buyers be aware, if you're connecting more than one HDMI device, and mounting the TV on a wall, either make sure your TV is set well out from the wall (I think you'd need a 2-3" gap) or buy more flexible HDMI cables.
My cables are sorted, and I'm delighted with the TV - it's excellent.