Surveys often find many users (particularly small businesses and self-employed people) value reliability more than speed. It’s very rare that a broadband provider will be able to literally avoid any connection problems ever, but reliability does vary.
When researching this issue, be wary of putting too much faith in internet forums and complaints sites as this can give a misleading picture: people very rarely bother to post comments to say their connection is working fine. It’s best to try to find reliability rankings from surveys based on as large a number of customers as possible.
Look carefully at claims by a company that it offers a particular level of guaranteed ‘uptime’ as these figures can give a misleading impression. For example, a 99% uptime sounds impressive until you realize that would allow almost four days a year without internet access, or more than 90 minutes a week.