Our rear roof has a steep slope and a large surface, which was too much for the existing gutters in heavy rain. Tim came out and gave me an estimate for an upgrade to 6″ seamless gutters and 4″ downspouts (with leaf guards on one section by a large tree). His team came out and did an awesome job, and were finished before I got home from work. The new gutters have had no problems with spilling over (even in a few heavy storms since they were installed), look great, and the leaf guards are performing well. Great experience, I highly recommend them.