Never used Plumbworld before but this purchase was a pleasure in all respects - haven't needed after sales so comments don't yet apply to that).
Website is excellent, product range the same. I couldn't find this particular shower unit cheaper anywhere and Plumbworld couriered this to me promptly and at no cost. To date I can't fault this company, I will update if I should ever need aftercare but I'm sure that will also be a great service!!