The ability to return faulty goods is part of our legislation. For a company to try and snare customers with the " 30 day satisfaction" are asking for trouble even though they would have assumed that the average good joe would be drawn to their lower price and at best get the market share from the weekend warriors. I have know of a few cases where people have bought items like portable generators etc., took them away for a weekend and returned them claiming they did not get enough power to do the job etc.
These low lives are a burden on all of us by increased costs and the destruction of trust between retailer and customer. I have had a situation where I wanted to buy a particular tool but was apprehensive because of the cost. I was invited to take it home and try it out. It did such a good job that I bought it even though it was more than I was initially prepared to spend. I must admit that I knew the retailer reasonably well for him to trust me.
Those who deliberately "buy" these tools and return them once the job is done are really only social parasites on the community and business. It would be much simpler if there was a no return policy for items that are 100% functional, and return only those that fall within the warranty parameters. I read that some one bought a tool and found it to be absolutley wrong for the job and that happens. Before you leave the store you need to establish if there is a return policy for cases like this, or do more reasearch in a forum like this to get a multiple opinion before you buy.