Having called Control Freq first thing in the morning I had the pleasure and good fortune to speak to Knowle. Knowle without doubt provided a service second to none as demonstrated by his superb and immediate technical knowledge and his willingness to help. His patience was outstanding dealing with a tricky problem which he did manage to solve after countless diagnostics and considerable effort. I was seriously impressed with the level of service provided and the support Knowle gave. If only all companies could provide such a service, I highly recommend this firm. Ben Luke-Director www.bluestoneltd.co.uk