With that feedback, I would like to try another option in a very diverse market. My preferences are, in order of importance:
1) 9mm Luger Single Stack
2) No thumb safety
3) Quality build and manufacturer
4) $400 or less (new or used)
5) Easy takedown with no or minimal need for tools
6) Easy customer service with warranty that follows the gun
7) Aftermarket support
8) Reliable with almost any ammo
Think I'll toss you in a completely different direction.
S&W CS9D, and that D is important...as it signifies DAO with no thumb safety.
Single Stack 9mm, definitely one of the highest quality builds & MFR,
Average price around $400, less in the South...
heck, its the only thing other than an S&W 3913 that fits your qualifications, but the 3913 has a thumb safety.