Seamless Home Products used to rule this niche for decades w/5-star reviews but not sure who runs it now.
Plenty of competition today and some with better Google ratings?!?!?
Hope you finally get some customers to report with inside data.
That said, if your foundation is slab-on-grade (SOP in Aggieland unless HUGE)
then some will place gutters only over the entryways & any HVACs THEN
where the roof drains into the perimeter bedding, they place River Rock, BullRock or equal
to prevent erosion. The results are
improved watering & quality for "garden"
consistent moisture all round for best foundation performance that guards against corners drying out = sinking = cracks in walls, above fenestration.
Less gutter cleaning and roof concerns?
Food for thought ....
Would love to learn 1st-cost comparisons but betting long term mainteance compare is a no-brainer.
Ten words or less ... a goal unattainable