"Try it before you buy it" is quite possibly my favorite phrase and my favorite thing about renting a lens.  What works for some might not work for you so rent it. Try it out and see how it works with your style.  I recently (borrowed) the Canon 50mm 1.2L from LensProToGo and fell in mad passionate LOVE.  Below you will find some examples of what the lens can do and I shot almost the whole session wide open.  Obviously, I need to buy this lens but until I can afford the $1,500 price tag on it I will keep renting this lovely piece of glass from LensProToGo.