In my opinion the P10S is a good defensive handgun.
Personally, I'm pretty brand agnostic in regards to handguns. For full-sized work pistols, I carried Sig P220/P226 for years but we recently transitioned to Glocks (G45). In the selection process we also tested the P10 series. The department didn't go with them, but I liked them so much, I bought a P10F and S. I use the P10F for hard training and local competitions along side my Shadow, depending upon my mood.
For concealed carry, depending upon my activities, the weather and clothing, I carry A 75D-PCR if I can conceal it or, the P10S if I need something a bit smaller. If I really need something small, I carry a Sig P939.
In my experience, the P10S shoots like a larger pistol. Its a subcompact so your pinky is liable to be hanging off, but the frame is large enough to get a good purchase. You can get really high on the back of the tang with the strong hand and between the design of the trigger guard and the large flat side, you get a good wrap with your support hand. My son has a P10C. While the P10C is probably better for enjoyable shooting, the P10S is large enough to be fun to practice with. It settles well and comes back on target well. Compared to the P10C or PCR, it is a bit more "snappy" but it is a subcompact. Compared to the P938, its a dream to shoot. I nicknamed the P938 the "noisy cricket."
Basically, the P10S is between a G26 and the P10C/G19 in regards to size. I much prefer to the G26 but like the G26, it can use the magazines from its larger cousins. I sometimes carry the P10S with the 12 round magazine in the weapon and slip a 19-rounf P10F magazine in my pocket. Gives me 32 rounds in 2 magazines. I'm a little jealous of you being able to find one on PSA at today's pricing. I paid in the low $500's for mine.
Someone in an earlier post mentioned the P10 is fully cocked. It is not. Its a partially cocked striker very similar to a Glock as opposed to a Sig P320/365 which really is "fully-cocked" and without a trigger safety to boot.
I hope you like your new purchase. For me, I had to work to get used to the break of the striker-fired sear as opposed to a DA/SA weapon. Most of that was probably my 30-year-old "old-school" grip. Once I became accustomed to a more modern grip, those issues ironed out.
Good luck.