Got free ticket to see it tonight from Sky, good film albeit not as good as Top Gun (but that's kind of a given, almost nothing is as good as Top Gun). I'd say it's an 8.5/10 compared to the original at 9.5.
Quite a few scenes were just homages to the original, a bit unsubtle/cheesy but it works, at the end of the day you want to hear Danger Zone with the sound of jet engines blasting in your ears and planes fizzing about on the big screen, you want to hear those one-liners you know so well from the original getting a second outing in a new environment etc. And because they waited 36 years between films, it feels absolutely fine that some material is sort of recycled.
Cinema screen was completely full (as in zero empty seats, they were making people shuffle along) 10mins before start time which is pretty rare these days, I can see this being a big hit, people in their 40s will be all over the nostalgia.
To be honest, I'm struggling to think of the last time I saw a new film as good as this, a few years at least.