Stability would be a nice feature

Now how about IPP2 support and tetrahedral interpolation?

So like last year?

The paid version of RAW Magic converts to DNG and compresses in one pass, and is only $30. See your double post that I replied to earlier.

Shot professionally on a 5D2 and 5D3 Raw.
Workflow: Batch convert all .mlv files through the paid version of "RAWMagic" ($30 - there are free alternatives but from my experience they require two transcodes, one for converting to dng and the other for compressing it lossless, RAWMagic does both automatically). I do suggest converting to 12 bit compressed raw, which is something like 3:1 compression and will cut your file sizes in half for no cost in quality. I don't know how Vegas handles cinema dng, but you can always use davinci resolve like to convert and lightly grade to ProRes or DnxHD before importing.
Is it a hassle? Depends on how you treat it. It's obviously not practical for event shooting like weddings or concerts, the file sizes are too large and card changes too frequent. I found it good for shoots where I had the most control. Keep in mind the media costs (computer hard drives are relatively cheap), I suggest the Sandisk extreme pro 1600x cards. Again there are cheaper alternatives, but they can yield inconsistent speeds and aren't worth the 10-20 bucks of saving (I've had off-brand CF cards downright fail before while transferring footage, luckily not on a professional shoot though). 128gb is a good place to start, get at least two cards so you can dump one while shooting. Treat your workflow like film - be conservative with your takes and try to get it right the first couple times since you will have limited space (128gb ~ 24 minutes for 1080p). The greatest thing about shooting like this for a while is that it trained me to be smart about managing media on sets so that when I started shooting Red Raw the size space or workflow didn't phase me.

Raw is a pleasure to grade, and the sharpness in Raw is night and day on the 5D3, the compression really is that camera's biggest cripple for video.

On a semi-related note. ALWAYS backup your footage to at least two separate hard drives at any given time. Redundancy is not a suggestion, it's a must if you shoot anything digital professionally, Raw or not.

Definitely not, not only is this generally more expensive then seeing something in a normal cinema, but it's not even the same experience by a long shot