Never tried the Retrogression ones but I've got some Holdfasts with Haro Small Block pedals and they are great. They feel much more secure to me than double straps and clips. Feet are glued to the pedals in just the right spot and easy to get in and out of. Also buy you a little more space on the front and eliminated the toe overlap I was having. Plus you never break or dent a clip or have those little screws that hold clips loosen up on you. They blow doors on single straps and beat doubles by a good margin too. If you compare them to a double straps and clips set up, they really aren't too expensive especially with newer brands like those Retrogression ones going for $25. No marks on your sneakers from clips and easily adjust to a variety of shoes.