This gun si awesome, and worth it for the accessories alone.
18 dart clips are always handy :)
Then the gun, it is a big thing and it gets even heavier with the batteries in, but my 4 year old manages to use it fine, I also opted to use d - AA converters to cut down the weight and add the option of upping the power if need be, but to be honest it fires faster than the raider just with 9v.
Great buy, great gun, but shop around as you can get it cheaper.
I received the stampede a week ago and it is an impressive piece of nerf kit if firing foam darts at people is your thing. It comes with three extended mags and one standard, the shield has a tactical rail mount so it can be seed with other guns. Fire rate and power are decent, I prefer this to the havoc fire as it's more usable.