I used the Edmunds.com price to buy the car through the ford dealership fleet sales manager. It could not have been easier. The car is one month old now and it's a fun car to drive... Just put the top down and go! I got the new platinum white color which I love because it has a nice pearl finish.
I loved my 2014 Mustang convertible (read the review), so I got a new 2017 to have all of the active safety features and other convenience tech. What I got was something that is a huge step up in quality. In fact, a different machine, with the feel of the BMWs (Mustang handles better in my opinion - test them) I tested and a huge leap above a Camaro. It accelerates smoothly up to 121 mph (where it is electronically limited), gets up to 32 mpg on highway (with super unleaded, about 29-30 with regular). Handles much better than the GT (again, try them out side by side - I did several times - GT feels front heavy and bulky). Drives like a sports car. Has plenty of storage, something lacking in the old Mustang and non-existent in Camaros. The only things lacking is automatic braking (something I will demand in 3 years or I will switch models), and lane warning/assist. The forward collision warning is great, but it just pre-loads brakes, probably a nod to the general macho among Mustang owners, but auto braking should be an option for those of us more concerned with being alive (and the safety of others) than imagined macho. Another after market add on is a windscreen, which really makes a difference. It makes your car a two seater when in place, but I never have more than one lady friend at a time riding! :) Easy to remove, but don't get this car for a backseat anyway. One small feature I love is the center console which locks when you hit the door lock fob. I leave the top down a lot when I go into a store. This combined with alarms keeps stray hands out that stuff. All in all, a wonderful car. If they add automatic braking, I will be getting another in about 3 years.
I noted most reviews were for GTs. I own an Ecoboost Premium Convertible. Acceleration is so-so. Handling is incredible. Only two complaints are the windows controls are too far forward and the antenna is awkward if you have a car cover but it unscrews solving that. Radio actually works fine without it screwed back in. The rear seats cannot be used for passengers but I knew that in buying it. They do make good interior storage - something the old Z-3 I had was short of. Gas mileage is killer. I saw acceleration is "so-so" only due to my last car, a Lincoln LS with the V-8, being no slouch so the Ecoboost doesn't seem to add anything to that. Compared to something else maybe it'd be more impressive. So niggling complaints on what has proven to be an incredibly handling car with enough pop to satisfy. Comfort on long drives is much better than expected - the Z-3 lacked in that department. Review says car acquired in 2016 as page doesn't have 2017 as an option - car was new in August of 2017.