A customer support that is able to offer you advice is very important, especially if you are a novice at computer programming. This customer support should be available at all times of the day and night, no matter where you live.
People from all over the world use web hosting companies and they generally opt for companies in the United States. It is possible that you will need to call at 2am on a Sunday morning but that should not make a difference regarding the service that you receive.
You can test what this service will be like by contacting them at different times of the day and week about the hosting service. It is best to stick with simple questions at first to test the politeness of the service and then contact them with tougher questions later on to test their knowledge. If you approve of them, then you can consider using them as your managed hosting company. If you do not approve, then it is best to stay away from that particular managed web hosting company.