Youhe S100 is by far the best bang for the buck shuttlecock out there. I use it at my badminton club and have successfully converted a few Aeroplane black and Yonex AS-30 users into using it. The flight of the shuttlecock is consistent as the cork does not deform like Aeroplane black. The feathers can withstand a lot of abuse. As always, steam it the day before playing for best results.
I used the Youhe S100 in tournament back in August for a tournament. The durability is pretty good, and I like the flight. The flight, I agree, is consistent, and not as fast as Yonex AEROSENSA. I had a few Youhe shuttles left from the tournament and they are pretty durable as practice shuttles too. One of the shuttles was a real trooper and survived many warm-ups. I don't have any flight or durability problems. Just as a disclaimer though, I didn't really focus on durability while I was playing in the tournament.
My experience with Youhe is that it is quite durable but also very fast. Started off with 77 (50 tubes), tried another batch speed 76 and it was still faster than Aeroplane 51. Wanted to go down further to 75 but Badmintonian didn't carry it anymore. Maybe it's not that fast but does not spin fast enough to slow down at the end of flight.
I used 76 speed initially but my club is pretty much smash city so I switched up to 77 speed for the last 20 tubes and people love smashing with it. As the poster above indicated, the used shuttles are really good for warm up since the flight doesn't slow down much even after it's beaten into the ground.
I visited Youhe factory some months ago I was really impressed. They are neighbors of the factory of my own brand and have special connections with I cannot elaborate, but the Youhe S100 has nothing to envy to Yonex top of the notch. It is well above the aeroplanes.
If you would like similar product at similar price look at our BS900, specially if you live in Asia. Sorry for the ad but visit www.bauhinia-sport.com and leave me a message.
Your BS900 is much more expensive than the Youhe S100.
It depends where you are and in what currency. That is why I said it is interesting specially if you live in Asia. We do not have shops in the US, so we cannot easily adjust to the under-valued US dollar.
Youhe S100 might not be the best comparing with other top models of birdies, but it is worth to have. The flight is consistent and durability is good. Also, the QC for the birdies are good. I compared with some batches of AS40 and I believe that S100 was better. You can get them less than $20 from badmintonian.com, you cannot expect more at this price.
"Thanks for interested in YOUHE S100. We will removed the shipping fee for your free sample shuttlecocks $11.95 from your order if you keep 10 tubes of S100 in your order. We will charge your credit card $212.49 for this order. Let me know if you have any question."
Or maybe they read BC regularly...
Any people in the bay area want to join me for better bulk rate? Or are buying and willing to take me in their order?