Holster availability is definitely an issue. I had one made by Andy Aratoonian at Horseshoe Leather that carries it very nicely. I also got a Kramer Shoulder Rig for it last summer. It is a good winter option, but not my favorite way to carry. The one off-the-rack holster I bought for it was the DeSantis paddle holster. Avoid that one. It carries it way too high, which plays against the butt heavy nature of the P7.
I think the point about the Squeeze-cocker as it relates to the function of the pistol is that you work it exactly the same way you work any pistol. The cocking mechanism is essentially automatic in that you do not consciously think about it. You squeeze (i.e. establish a firm firing grip), and it's cocked. It's just that simple. It is helpful to think of the cocking motion not as an active, conscious act, but as an automatic, passive process.
I think the thing that some people find off-putting – principally those who have had the opportunity to handle the P7 but not shoot it – is the difference between the grip geometries when it is uncocked, and when it is cocked. Personally, it took me all of about one box of ammo to get over that. Then again, I was familiar with the design, and had a positive perspective about it. I truly believe mental attitude greatly influences our experiences and perceptions.
For what it's worth, while I respect and have a positive perspective about the Glock, I have never gotten used to the feel of the safety on the Glock trigger. I'm sure I would with more practice, but after shooting eight of them in short succession over a couple of weeks (I had gone shopping for a Glock when I ended up getting the P7 a few years ago), it still felt weird to me. That was a surprise, as I had, and still have, a respect for the mechanism similar to my respect for the squeeze-cocking mechanism of the P7. It is an elegant design solution. I do not presume to think this discomfort is a defect in the gun, merely an acclimation challenge for me.