My overall impressions after spending basically all day yesterday trying out the new aircraft and other features.
The aircraft are a bit of mixed bag. My favourites so far are the Beaver, the Cabri G2 and the 407. I really wanted to like the DC-3 but it just isn't there for me. Lots of issues with the 3d model and textures aren't great either. I think dvj summed it up pretty well, it's very much in line with what AH has putting out for MSFS. The Goose and the Spruce Goose are fine but they just aren't really my cup of tea. The Wright Flyer, the Jenny, and the NYP are nice but not super practical for much of anything aside from recreating historic flights. The NYP 3d model is spectacular though, I'm happy to have such a faithful recreation in the sim. I don't like gliding so I didn't enjoy the gliders but they seem very well made and I had no issues with the towplane or winch.
The new heliports are also a bit of a mixed bag, but the custom ones I've seen like the Needles lighthouse and some of the skyscrapers in Dubai and Hong Kong are excellent.
The missions are just so incredibly disappointing. No voice acting, no custom scripting, no custom 3d models, you are basically just instructed to fly from point A to point B while a robot talks to you. I saw someone mention on the official forums that at least one of the missions used the voice acting from previous games, but so far I've heard nothing but text to speech. There's no intercepting UFO's, no rescue missions, no flower bombing, no slingloading, nothing that made the missions in previous games standout is there. I would have rather had 5 excellent missions than 24 poorly made ones.
Considering everything is free, I'm not going to complain too much, there is a lot of stuff in this update that I really enjoy but I really wish they had added a little more structure in the missions as I was really looking forward to them.