I am newer to the CZ game than many here, but I jumped in and bought a full sized 75B PO1 and a 75D compact in the past few months.
As you may be aware, the PO1 adds a longer bit of frame (“dust cover”) compared to the standard CZ 75. It makes the PO1 a bit heavier out front, which helps dampen the flip from recoil a bit
but also adds weight to a carry gun
. Depending on the desired use, the little bit extra weight of the PO1 compact will probably be beneficial.
The grip, to my mid-sized mitts, is perfect. As the guys above said there is a DA trigger reach that can be a stretch for daintier paws, but if she was shooting a USP this should not be an issue.
The compact version I have has a slightly more curved trigger than the full sized PO1, this may or may not help. ( I believe Cajun Gun Works sells a shorter reach trigger if you want to swap.)
The CZ in-frame slide design (allegedly) puts the barrel low to the hand, arguably reducing muzzle flip and keeping it down for quicker/easier follow up shots. Im not an engineer, nor do I have a calibrated “degree-of-flip” scale to do a side by side comparison. I can say that shooting the CZ’s is easy and they do seem to stay put nicely.
I will agree that the in-frame position of the slide makes it short and narrow. This does make grasping/retracting the slide a bit more challenging than the much more common frame-over slide designs. It is not undoable, but it will take a bit of getting used to.
The one mod I did do was a Cajun Gun Works spring-firing pin swap to lower the trigger pull weights. I am a certified armorer for several pistols and S&W revolvers so I can move about inside most gun designs comfortably, but replacing the CZ trigger return spring without extra hands has been my least favorite gun related task (by far!). If you try, be patient, watch a couple of you tube how-tos and expect to chase that dang spring around at some point. My Po 1 pulls are now sub 7lb DA and 3lb SA, the compact I left the stock trigger return spring in and its 8lb DA and 3.5lb SA. (I will admit the reduced power spring shot into low earth orbit so I had to put the stock one back in
.)
Again, if you can get her to shoot one first you will know if the 750-odd bucks one commands OTD now will be money well spent.
Stay safe.