Summary: It works as described, but I have two issues with it. 1.. It's not the most intuitive admin interface on the planet. The unit was taking quite a long time to initialize the SIM which was making me think that it wasn't working correctly. I phoned the TP-Link support number for some assistance and got through to a support person in Japan (I think) who was worse than useless.
Summary: I bought this to use with my router as fall-back for my broadband and for my laptop when out and about. I could not get it to work on either box and it was too late to send it back. Steer clear of this.
Summary: Did nothing just shows that there is a sim card in it , If you have a sim card from a recognise network then this won't work on tp dongle I can't see it working on O2 or EE network. It looks to me like a fake, don't buy!
Summary: It is not working in the countries i do visit, I don't think it is TP-Link problem but I think there is special products for the ISP's in the Countries I do visit so I do have to buy a local version in each country, have 14 until now.
Summary: Genius idea for a mobile system. Works fine with Win 7. If you get an InstallShield error as I did - don't blame TP-LINK - it's your InstallShield regisrty. A quick fix for that is to run the Setup.exe from NT Authority. (use Sysinternals psexec -i -s cmd.exe and then launch Setup.exe) Tomorrow gonna test if it possible to boot Live linux from the SD and get the modem to work under linux.
Summary: I live abroad but was visiting Scotland for a couple of weeks and wanted an internet connection in the flat I was using. I didn't have a smart phone at the time so this seemed like a good option. I simply ordered a free sim card (any network will work) I used Giffgaff which offers good rates for internet. I paid for 1GB of data upfront which was more than enough for checking email and light internet surfing.