I play Badminton everyday in my PE class. Me and my friends have been using feather shuttlecocks for 2 months. They have good feel, but only last around 2 games. (yes we steamed them and everything).
We finally grew tired of paying $15 every 2 weeks for another dozen birdies. We bought these.....
THE BEST $15 I'VE EVER SPENT!!!
They're so durable, we're still on the first one! So far it's been through 9 games! (and we beat the heck out of it) We played on concrete today....the tip isnt even scuffed. My friend even stepped on it twice...it maintained perfect shape! If you can sacrifice a tiny bit of flight recovery, these things are for you. I got used to them in 2 games. Great for avid players.
4 stars

Good for club play if you like nylon (lasts)..... but Mavis 350 better (cork+nylon). 4 stars

overall statified with the shipping time and the quality of the product. Will reccommend to others 5 stars

We use our shuttlecocks (birdies) a lot, and these hold up exceptionally well. Unlike the cheap ones that quickly fly apart, we have yet to break or even damage one of these (although some of them are a little dirty...:) They don't have quite the fly-power of some (i.e, they don't go quite as far as some I'm used to) but once you get used to this, it's no big deal. These may or may not have the control/speed/etc that some people want from a birdie (I don't know, I'm not an expert by any stretch!) but these are the sturdiest I've come across. If you play a lot and hate watching caps fly off and feathers break, you'd probably like these. 4 stars

I use to send lots of money on other shuttes, may be other shuttes are cheeper, but you will spend money on huge quantity (only last for one game if you are lucky), but this one really worth it, I played more than twenty games still going on, this will really change your game. 5 stars