+1 to that!

I've used both and it really doesn't matter. You want to learn a technique, not draw and shoot it. One thing I would recomend is that you file off the sights on whatever training gun you buy. I've lost lots of skin on plastic sights.

For what it's worth I've even traced the outline of my pistol onto a 2x6 and used a jig-saw to cut it out. I then rounded off the corners and painted it. The beauty of that was there was no trigger hole to put a finger into and thus loose a finger.

Take Care and Stay Safe.