I may be pinning this water feature but I really don't like it - horrible shape, I'm thinking splinters here - they're just trying too hard to be gimmicky. The decking will go rotten and it will look out-of-date in the blink of an eye!
Raised beds, collecting rainwater as well. - perhaps tiered beds can have a French drain at the end that catches excess water run off from the rain. It would be a larger area to collect rain water and would only be extra If the other plants were all watered.