I have been shooting on a PMW-350 for a little over a year and really loving it.
I am a freelance who has news clients who shoot in various frame rates, aspect ratio ect.
This camera offers a great picture and is easy to use.
The advantages if you are switching over from a disk or tape based camera is you will get a lot more battery life. I can run mine with out camera light for over 5 hours on a Dionic 90. True the lens it comes with is not super high quality, but because it is a b4 mount you can always add decent glass later.
The option of being able to record on both SXS cards as well as high speed SD cards is both a huge financial incentive as well as a help with work flow. If you are using the SXS cards your client or producer needs to have a laptop with an express card port.
However if you shoot using the SD card adapter you can just use a USB to SD card adapter to pull it in to any computer. I have been using the hoodman adapter with a 32 gig class 10 SD card- it works flawlessly and will fit 116 min. at 1080 30p.
The one issue that did catch me a bit by surprise and needs to be looked at especially in the news market is the "flash banding" issue.
Until I did my first "Red Carpet" with the camera i did not know what the issue was, but basically when you are in an environment where there are no stop flash going off it causes a grey band to move through the image, my understanding that this is caused by the combination of the use of a "rolling shutter" and the CMOS chips.
Sony includes a "flash band repair" utility with the cameras software. You really need to use it if you have this problem- I think if all I did was red carpet, I would use another camera.
Some of the other great features of the camera is is is switchable PAL/NTSC in the New York market, this is a huge help with international clients.
All in all it has been a super addition to my camera line up, seems to be well built and has been asked for on a regular basis by my clients.
Two major clients have switched this year from DVCAM making this there new in house format.