Pretty positive.
I had my doubts initially but the second trailer and the wealth of behind-the-scenes production materials released in recent days mostly cleared them up and gave the information released before better context. The trailer felt very cinematic in scope and verified that instead of relying on tried and true cliches of Trek series past, it looks like they're at least making an attempt at forging a new path while still paying homage to the general spirit and intent of the originals.
The VFX was spectacular. The Klingon ships, costumes, and makeup were all pretty weird looking just as standalone concept art or props, but work remarkably well once they're fully integrated into the scene. The gothic-insectoid Klingon ships in particular were spindly and frail looking on the page but came across as quite intimidating and otherworldly onscreen in a way most Trek ships don't, so that was good to see.
The prop, costume, and makeup department has knocked it out of the park as far as I can tell. I've actually considered buying some Trek memorabilia and replica props for the first time in years.
The cast looks like a great and diverse bunch of actors who are having a good time and I look forward to seeing them in action. I was always a fan of Sonequa Martin-Green while she was on The Walking Dead, so I had confidence in her performance here, and from all indications in the trailers she should make a compelling lead. I also like the angle they're taking of not focusing on the captain but instead on a junior officer, and one who has experienced some adversity that makes her untrustworthy to the other crew(s), which she will have to overcome as she climbs the ranks. It's like getting an Ensign Ro/Tom Paris POV character and also one that addresses some of the promises of the Voyager premise with the rough integration of the Maquis crew.
And it's hard to go wrong with Michelle Yeoh and Jason Isaacs, even if they're likely not long for this world. James Frain is always a plus as well.
The changes to the appearance of the Klingons and the technology don't bother me because it was inevitable and natural. I love the TOS-style too but they're not going to try and maintain a 1960s aesthetic in a 2017 show, and it would look ridiculous to do so and try and pass it off as being set centuries in the future. It's easy enough to just imagine that things were always upgraded like this, or don't if you prefer. The bottom line is, it's the stories and the acting and the overall presentation that matter so much more than things like that, and from all indications they seem to be doing well in those regards. The cast and crew are first rate.
I'm looking forward to it more than I was before.