seems to be a good offer on the face of it - how long have forum members been using it and any drawbacks or feedabck would be welcome from anyone
I have been using Samba for the past 6 months or so. I am not a heavy user of tethering so this suits me fine on the odd occasion I need my iPad when out and about.
Samba works on the Three network, so any Three Mifi / USB dongle will work with the sim.
Building up data credit takes a while. You used to be able to open multiple ads all at the same time so you could easily view the day's entitlement of ads within 10 mins, but they have caught on to that, and now you can only view one ad at any time.
For that reason I have only managed to build up around 4Gb data over the past 6 months, but I dont top up every day and only do so a few days per month when I can remember!
Overall, a good service, as long as you bear the above points in mind.
Others might find deals like this a bit better and less hassle:
http://www.amazon.co.uk/Three-3GB-Data-Preloaded-Card/dp/B004O73WXM/ref=sr_1_1?ie=UTF8&qid=1359713756&sr=8-1