No, there not junk. IMO, they are one of the best mechanicals. I've used them for a few years and took both deer and turkey with them. I've gotten pass thru's that sliced ribs clean in two. My first shot at a deer this year was a bad shot, high and back, but didn't get a pass thru. Shot a Nitron a week later and missed. I wasn't feeling real good about my heads but reality was, it was the shooter. Anyway, I bought some Rage Slipcam 3 blades and used them the rest of the year. The Rage heads were awesome. I still think the Spitfires are good blades. Don't try to use them straight out of the package. Check all of the blades and make sure they are opening/locking just right. I've found most of them are too tight. There's a small metal shim with a divot that fits against a hole in the blade. I'll take the screw out, pull out the blade and shim, flatten the divot slightly or take a small screwdriver (like the ones in the eyeglass repair kits) or any other semi-pointy utinsel and tap the divot to make it bump up more. If the blades too tight, flatten it. If its too loose, make it protrude more. Play with them until you get them securing the blade good but easily releasing with a bit of pressure. I'll usually put just a dab of oil where the screw goes thru. Their no different than any other head in that you will need to resharpen/replace the blades after every shot, maybe two. I just buy the replacement blades.