I'll be the contrarian, I guess.
Reports aren't in yet on the P220ST, but the lighter P220 has not had great reports from various police armorers, as detailed on the Tactical Forums. Seems this gun is not a high round count gun.
Bought new, it should be perfectly fine for CCW use. But if you plan on shooting it more than 20,000 rounds or passing it down to your grandson, beware.
Long term, there are more durable options.
In addition, beware of buying a used police trade-in where you don't know the round count.
Like I said, the P220ST may be a different story. Search the Tactical Forums for more info on police experience with the P220.