These carabiners are okay for racking, but just okay. They're really small compared to other wiregate carabiners. Because they're so small, I find them hard to clip and manipulate, especially while wearing gloves. They are very solid for their size and the gate action is smooth and strong. They are much lighter than other carabiners, so if you're looking for a super-light alpine 'biner, these may be right for you.
Pros: Cheap, light, color codedCons: Have a hooked nose that can get caught, not awesome ergonomically.These are great for a trad rack, but I wouldnt incorporate them into sport draws because they are just not as user-friendly (see cons) as others (ex: petzel spirit)
These carabiners are great. I use them to clip my shoes together and its really handy to keep my stuff organized. The only thing i didnt like is that the set i received only had 2 colors between the six carabiners...green and an odd brown/maroon color. but other than that its a great product.
I have used these carabiners for all sorts of use when climbing. I usually clip other equipment to it and can easily unclip and clip it back in. I do not have to worry about unscrewing or finding an unlocking mechanism. I have recently added one to hold onto my chalk bag as the string becomes a nuisance.