There are some crappy ones out there for sure...but the one I linked is pretty awesome for those just now starting to wonder about how to put their miner on wireless and don't want to jump through a lot hoops to do it.  I do high-end networking for a living and I'm not easily impressed with home consumer-grade gear..but this little box really surprised me for the build quality and the signal strength it was able to maintain throughout the house during my wireless torture test.