....I bought this for the kids anyway; regardless of the fact that there are twice as many 1 star reviews as 5 star reviews. I figured that many of the parents that aren't familiar with loading this type of gun may be part of the problem, and people using the wrong darts being more of the problem. I am happy to report that I think I was right. I haven't had any problem loading the gun, and the thing has never jammed for me. I bought two, for my 6 and 8 year olds. They have used them on three separate battles now, and each gun has jammed no more than 3 or 4 times for each of them. I would say they have fired each of them 100 times, and had maybe 3 jams...not too bad in my opinion. I can say that after clearing the jams for them, two of the darts have been completely shredded, but I was able to get them out just fine. Most of the jams come from the kids not cocking the gun good and hard; ram it back, ram it forward...fire. No jams. And if you're quick firing, just make sure you slam it all the way back, and all the way forward. Don't leave the gun loaded, because keeping the internal spring compressed will weaken it and not push the darts up into the breach as effectively, which can cause jams. I noticed this after my son left the internal clip loaded over a few days, and when he tried to fire it the spring didn't seem to push the darts up as well and then the receiver wasn't loading it all the way into the breach causing a dart to fold, and of course jam. I unloaded it, reloaded it...no problems. And of course, never leave it cocked; the constant pressure on the O-rings in the air chamber will cause it to break down pre-maturely. I give it 4 stars and say if you use it the way the designers intended, you'll have no trouble.