Using VPN thru DSL

I telecommute full-time to my job (through a VPN) and presently use Charter cable (20mbps down/2 up). I would like to relcoate to a different area but they only provide DSL service for internet (Comporium). Their fastest speed is 11mbps/1 down. I have always worked with cable, and wondered if you know how well DSL performs for working 8-9 hours a day with alot of downloading and uploading very large files. Thanks