This is quoted from BobVila.com:
"A simple way to check on a gutter’s performance is to wait for a rainy day and look to see if water is emptying from the downspouts. If water isn’t flowing freely from the bottom of a downspout, or if you notice water overflowing the edges of the gutter, there is debris clogging the gutters or downspouts or both."
This statement is very true and it would be a great idea for home owners to check their gutters periodically. I have seen houses with extensive damage that could have been prevented if the home owner checked their gutters. You don't need a ladder you can see the symptoms from the ground.
Bob Vila also says:
"The easiest answer to most gutter problems is to clean your gutters on a regular basis."
This is what I have been saying for a long time. You don't necessarily need a gutter repair or new gutters if the system is not working properly. More often then not, a simple gutter cleaning can solve the problem.