D-bol is very popular because it gives great size and strength gains. The down side, which is the case with all steroids that give good size and strength, are the side effects. Dianabol is 17 alpha alkylated, which means it is toxic to the liver. Nolvadex should be on hand when D-bol or any other anabolic steroids to prevent gynecomastia. Regular dosages for dianabol are between 15mg-40mg a day.
Most steroid user prefer taking dianabol with other steroids, usually a testosterone.