Unlike the Pioneer and Sony models, the Panasonic will not add 16:9 flagging on the DVD-R disc. With the Panasonics, you get what you record. If you record 16:9, it will be a 16:9 ratio BUT since the Panasonics offer no flagging, the ratio will look as 4:3 to all DVD players. Since you need to have a 16:9 flag on 16:9 ratio DVDs, so that they'll play in the correct ratio on 4:3 televisions, you'll only be able to play on widescreen TVs to get the correct ratio. Otherwise, the 16:9 ratio will be squeezed vertically on a 4:3 set, and everything will look thinly distorted.
Many people who record 16:9 material went with Sony since it's 16:9 flags are manually set. Pioneers flags are automatic meaning that the source must also send a flag for the Pioneer to detect, so that it'll add it's own 16:9 flag. Since some less than perfect sources don't send their own flag, the Pioneer wouldn't flag that 16:9 material. This being best for the Sony manual flagging.
Have a good one.