I love this thing. It adds thickness to the 3DS and makes it easier to hold without getting cramps. I have encountered 2 problems with the product though. One's the same as what the other reviewer mentioned; an easier access to the stylus would work wonders. The main issue I have with this though is, the plastic at the bottom corners are starting to break down. It doesn't hold my 3DS as tightly and snug as it did when it was new. It makes using the system's gyroscope feature harder, when the battery pack easily falls off. I can't play with it on anymore and is now merely a charging dock for on-the-go. It's still a great product though.
I trust CTA will do a revision of this. After all, they did release a better version of their hand grip. I wouldn't recommend changing the design, I love the simple look. Adding 2 little prongs at the top of each corner that can utilize the 2 little holes at the bottom corners of the 3DS will suffice, I think.