it allows you to get full network signal on your phone. so when people call/text me i can actually answer it.
Im only at home for 8 days a month, so people contact me via mobile all the time, as they know they will get me, the signal at my home address is so poor though, i can only take calls in 1 room. Now i can take them anywhere i want, and also in the garden!
its horses for courses, the only time ive ever used my landline is when people have called me and ive had to ring them back because my signal dropped, whats the point in paying for calls when i get them for free?
oh, and no, i dont really see why they market it as getting 3g in the whole of your home, as you say, just use the wifi... :/