I actually use vodafone empresas and have 6 lines with them and have no problems with them at all.In case you did not know (and I did not until my new vodafone guy told me after he checked my tarifs), they actually do a 3G Tarifa Plana for business which consists of 5GB of bandwidth per month at 3.5MB speed and if you exceed that, they throttle ...

I work from home and the internet is my business so I myself have a 10MB ''professional'' line with telefonica (€150 per month) and have honestly never had any serious problems with it. However I live right in the centre of Marbella and the exchange is just around the corner.There is a little known (positive) thing about telefonica adsl though, ...