That's the one I carried for a few years. Great stuff, BUT I don't feel secure about the locking mechanism and thus replaced it when it expired with one with a more secure firing mechanism.
Never had an issue, Been in both vehicles for 2 1/2 years and expires in 2020 so i'll replace it with the same one, I had the wife test it on a paper plate VS the smaller one 1st posted and the small one works and has plenty in it but stream wasn't as strong as the ones I keep in the vehicles.
The sabre red pepper gel is what i carry. It is so much smaller then the MK-3 size. I know the MK-3 size is better but I know I could have enough sprays in the key chain size to stop a threat.
I am baffled on how to conceal a "MK-3" regular sized "police size can" of pepper spray. Forget IWB carry of that, I tried carrying it on my belt it prints more then a gun would. Printing isn't my concern with this it's the pepper spray can it getting in the way of things as it protrudes from my belt. I would only go for this method of carry picture below if I got out of state or I am not carrying that day.
Holster is the Bianci Patrol tek. I think they merged with safariland. It's made out is solid nylon and will never break. It's the best I can find. The police style holsters with the flap print way too much.