The Panasonic S60 is a good basic plasma. Its blacks are really impressive for the price. However, it reflects a lot of light and it doesn’t get very bright, so it is definitely not suitable for a room with windows.
The S60 is really meant for a dark room. Its blacks are really deep and with great shadow details. It cannot get any better than this for its price.
You will notice a lot reflections as soon as you turn on the lights. Combine this with the fact that it can't get very bright and you will not see anything in a bright room. If you plan on watching it during the day, go for the ST60 instead (it has good anti-glare).
It is a little bit less of an issue when watching bright content.
The viewing angle of the S60 is very good. You will not have any issue watching it on the sides.
The S60 had some noticeable phosphor trails when watching 24p content. This was greatly reduced for other frame rates, though.
The Panasonic S60 Plasma TV is very similar to the pricier ST60, assuming you have a dark room. When you turn on the lights, though, the picture gets washed out a bit by the reflections. If you normally watch TV with the lights off, this is clearly one of the best bangs for your buck that you can buy.