Watched this last night, really enjoyed it.
Loved the recreated scenes from the first film and the attention to detail therein.
I felt some of the casting was a wee bit iffy with Sarah's character, more so with Kyle's. Didn't feel they stood up to the original cast, but then this was probably down to the need to get recognised actors in, rather than being overly true to the stories original characters.
Really loved to see Arnie back, he did a good job despite being pretty old. Demonstrates just how amazing his overall body condition was back in the day.
Some of the time line stuff hurt my brain and some flaws appear, but best to just sit back and let the film play through. Oh and I have completely erased from memory 'Rise of the Machines' and view 'Salvation' as a completely separate film. Both enable me to enjoy all that is great about this and the original two films.