Have tried both Evnroll and Edel. Gamed the Edel for 90-days and struggled with how shaft aligns with head and returned to Golf Galaxy. Prefer the Evnroll ER 7 which has a 1/2 shaft offset. My putting has continued to improve and am a real advocate for their products. Plus the service provided by Guerin and Travis at Evnroll is not matched by other manufacturers.