pavers

Is it worth the extra money to have a concrete base for travertine pavers? Most of the PBs here install them with a sand base.

Anyone use techo-bloc Aberdeen pavers for their patio? We are leaning towards their rock garden brown color and am looking for some inspiration for bring it all together with walls, wall caps, steps, etc. If anyone has used this would love to see pics of the colors and materials. Thanks in...