I considered the Sleek, but ended up with a wireless router and an ASUS Wireless Ethernet Adapter, http://www.amazon.com/EA-N66-Ultra-Fast-Wireless-Repeater-High-Power/dp/B007ZT23ZE/ref=sr_1_1?ie=UTF8&qid=1367479658&sr=8-1&keywords=Asus+N66+Ethernet+Adapter.
I hook it up to the WAN side of my wireless router and it connects to the Wifi network on the Mifi. All of my devices, laptops, ipads, iphones, NAS, etc connect to our internal secured network. This lets us use our wireless LAN and the Internet parked or driving and even when internet is not available, we can still watch a movie off our local storage.