Terminator Genisys: Big, dumb fun
Do not go to this movie if you are seeking a plot that makes sense. Do not go if you are seeking good acting, though Emilia Clarke does a credible turn as Sarah Connor. Do not go if you're seeking a mental challenge.
Do go, however, if you'd like to turn off your brain for a couple of hours and watch things, in the immortal words of Billy Bob Briggs, blow up real good.
The film is both a reboot of the Terminator franchise and an ode to the first installment in that series. Arnold is back, but through the magic of this-makes-no-fucking-sense-whatsoever, he's now a good-guy terminator whom Clarke affectionately calls "Pops." Oh, yeah: he's her daddy. Not physically, of course, but emotionally.
Did I mention the movie makes no sense?
The effects are good, the many villains are interesting, and I do love watching Clarke. Arnold trying to learn to show emotion also provides some high points. I enjoyed myself.
Just don't go without being clear on what you're signing up for.