We got by on the bosch floor lasers for years (protiler). My partner has the ProNivo one for about the same price and he loves it. The lines go out the back as well as the front so that's an added bonus. We mainly use them for setting out though and once we're happy we ping a decent chalk line. Saves a fortune in batteries and you can't accidentally move it. Red chalk is best on durabase and get it well chalked up.