I rented a roto tiller for my yard and went to City Rentals instead of Home Depot. City Rentals had fewer choices for what to rent (2 sizes while Home Depot had 4 different sizes) but their "Small" tiller was the same size as Home Depot's Large for a cheaper price.
Not only were they helpful in showing me how to use the tiller but they also loaded and unloaded the tiller from my truck. To top it all off I rented the tiller for 4 hours $15/hr but they only charged me for 2 hours.
They may not have as many consumer grade tools to rent but getting an industrial tool for the same price as a Home Depot rental is a much better deal. Not to mention the better customer service and friendly staff.