Have it and like it alot.
Here's some impressions:
At the start, you'll notice there's no tutorial, unlike last year's version. If you've never played any previous Gallop racer, you might be lost.
You start out as a jockey with no horses and 1 trainer that you pick in the setup screen(doesn't matter which one, because all of them will make appearances later on as you continue to succeed). That trainer will give you "requests" to ride horses for them, the catch is that they come with goals attached(win, place, top-3, over odds, just to name a few). Meet those goals on a somewhat consistent basis and you begin to have a better relationship with the trainer(s), which then opens up reqeusts to ride much better horses for them. If you've met the goals set on any trainer's horse in 3 races, then you become the main rider for that said horse. Once that happens, you control where and when that horse runs. This is the main way to build up your own fleet of racers, along with the 2-yr old auction(1st week-July), gift horses from other jockeys and trainers, and eventually you can start breeding them, from your retired crop, later on.
The racing itself is harder this year, but more fun IMO. The starts matter very much for a front runner, but you won't be punished greatly for blowing a start with a rear runner this year. The main thing added this year is a slot machine indicator that spins at various points in the race. Ride a horse perfectly, and you'll be rewarded with 777's in the stretch run, and then it's good luck catching you.
1- Don't take all the requsts given, as some horses are really bad and it will cost you. Look at how he/she stacks up to the competition.
2- Don't run a mid or rear-runner on the rails this year, it's almost certain death. It won't open up like the Red Sea like last year's version, I learned the hard way.
3- Take a mid pack or rear runner outside of everyone at about the four-furlong marker and give a couple of taps to bring him/her up closer to the front before the stretch run. The game doesn't penalize you for taking them 10 to 15-wide and you'll win many a race using this strategy.
There's alot more, but too much to add here. I can try to answer any questions, and help out wherever I can.
Fun Game, especially for any horse-racing fan.