I'm using Vegas 14 Pro. I cut my 2017 demo reel
using the program, and it went very smoothly.
I really appreciate some of the small but necessary fixes, like how FINALLY Smart Sample can be set to Disabled by deault--this always made me nuts in previous releases. And the new GPU based Smart Adaptive Deinterlacing is quite good! This isn't something I need often but I did need it a few weeks ago and it produced the best/fastest results I've seen. (I can get better results using Re:Vision Effects' Fields Kit but that's too slow if you need to deinterlace a ton of footage.)
What I like about Vegas is that I can usually throw any size footage in there and it usually just works. (MKV is an exception. Vegas doesn't like it but there are tools to remux to other containers.)
I noticed the other day that it can output ProRes natively now (Build 211). I don't normally need ProRes but that's good to know because I've had clients insist on ProRes delivery and I've had to convert my output using other programs.
The only big issue I've run into with Vegas 14 was with the project I'm currently editing. Early this year, I had switched from using AVI to MOV and using the lossless MagicYUV codec. This worked great for the short demo reel I mentioned above but with the longer piece I'm working on now, Vegas became sluggish and crashy.
So I switched back to AVI but kept using the MagicYUV codec. Now Vegas is speedy and responsive again and I haven't seen a crash since. I checked with the Vegas forums and a user there told me that he uses AVI with MagicYUV too, and avoids MOV for Vegas because it brings too many problems.
FYI, I did try the MagicYUV MOV files in Premiere the other day, and they seem more stable there, at least in the brief test I did. I keep wondering if I should go back to using Premiere (I had stopped using it about 10 years ago,) since it comes with my CC subscription anyway, but I just like using Vegas too much.
I'll keep using Vegas unless the new company somehow really screws it up for me. So far, it's been working well for me though and I'm pretty happy with it.