A friend runs an automotive repair shop and we are looking for a CRM type system to manage the client relationship, sales and service reminders - a long with an inventory system. Currently he just produces invoices but we want to sharpen up a bit and we are looking around for a good system.

Can anyone recommend something they may think is suitable? either onpremise or hosted solution? I have performed a quick Google but would like to see if someone has had similar experience with any.