Hey Miners

I'm now starting to take the first steps on mining Bitcoins.
To start bought a Block Erupter @ 330Mh / s.
However some item's ordered to mount my mining station which includes:
* RPI
* WiFi Dongle
* D-Link DUB-H7
* 2x Block Erupter @ 330Mh / s
After making this purchase I saw that there is a store (Barcelona - minerfactory) that sells "pens" to mine USB (USB miner Nanofury 1 chip). I wonder if anyone has shopped at this store and are reliable.
Have now take this opportunity to ask you if there is a "problem" in place on the same HUB Nanofury and Block Erupter ('ll install Minepeon in RPI).
Thank you in advance for your help.