Got mine late last week, no problems. CDNN even gave me the discounted shipping, despite the fact that I ordered them before the Weekend Specials page actually went up online (thanks, CDNN!). I think they're still out-of-stock at CDNN right now, but when they have them, the mags sell for $24.99.
Looks like they've upgraded the packaging from the plastic baggie. If you're looking for them in the stores, this is how mine were packaged:
Didn't have much time today, but got a chance to run 200 rounds through them (2 mags, 4 full loadings of 25 in each mag). Ammo was CCI Blazer lead round nose (the ammo that my newest 10/22 prefers for reliable functioning).
100 rounds through each mag, no stoppages at all.
Mags seem very thick and solid; I don't fear dropping these on the concrete like the other plastic mags. Not sure of the material, but my impression is: solid as a rock.
Easy to load, too; very similar to the 10-shot factory mags in this regard.
Two thumbs up so far; will be testing them in two other 10/22s in the future, and if they perform similarly, I'll be junking/selling all my other hi-cap 10/22 mags.