This is a very timely thread for me.
After seeing the comment above on the size/bulk of the Sneaky Pete holster I've been considering, I Googled a number of videos.
Comments on the holster in those videos support the comments above on this thread.
I noticed, however, that most of the guns in those reviews were considerably larger (and fatter) than the LC9. One used a full-size Kimber 1911, one used a Springfield .40-caliber XD, and so on.
The LC9 is less than an inch thick, and barely six inches long. Since the holster is specifically sized to the gun it's intended to carry, I expect the final result will be a lot less-bulky than the holsters I saw in those reviews.
Since I still like the concept, and workmanship looks very good, I'll probably order one and give it a try.
I hope it doesn't join the others in that boxful of discarded holsters that I've amassed over the years....