Has anyone ever used one to practice with? Would it be a complete waste of £30 ($50ish)? I want to straighten up my stroke. I am thinking of getting lessons too as well as this.
Here is one on ebay
https://www.ebay.co.uk/itm/PROVECTU...m4b62572a8a:g:GfoAAOSwk1BcrPO7&frcectupt=true
Here is one on ebay
https://www.ebay.co.uk/itm/PROVECTU...m4b62572a8a:g:GfoAAOSwk1BcrPO7&frcectupt=true