I have been useing CloneDVD and AnyDVD for a year now and have over 500 DVD under my belt with 2 coasters that were my fault.I always keep my programs up todate. I am useing a nec 2500 burner and I have been thinking about Going with a Dl Burner. Has any one heard any bad feed back with the NEC 3500aDL or the 3520ADL. Thanks for any feed back!!!!!