The stick edger attachments or dedicated stick ones work for light edging like maintaining a previous edge, but it is simply not enough power to do neglected edges or those that have never been done before.
If you can afford it, get a wheeled edger, use it in the Spring and maintain with a trimmer all year. You can use the wheeled ones also for beds, installing edging, etc. If you ever had a lot of edging like a apartment complex you would dream of a wheeled edger after a few hundred feet with a stick edger.