Vodaphone Broadband Signal Booster Question

Hey guys.

I am interested in buying a signal booster for my vodaphone E169.

I found this one : http://cgi.ebay.ie/11dBi-External-Booster-Antenna-Ariel-HUAWEI-E169-E169G_W0QQitemZ360109720786QQcmdZViewItemQQptZUK_Computing_LaptopAccessories_PCMCIACards?hash=item360109720786&_trksid=p3286.c0.m14&_trkparms=72%3A1300%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318

I saw these got good reviews in the UK but I am more concerned with how they work here.

Has anyone got one of these or anything like it?

I get about 3>4 bars with gprs (which isn't fast as you know) and 0>1 bar with 3g (which i really want to use as the default).

Even keeping the 3g signal at 1>2 bars without it dropping to 1 would warrant the 70 euro price..

Thanks so much for any responses.

Cheers!