We have 6, purely because they're a short term spring offer from a supermarket with gardening section and stocks are limited so we but what we can. 3 last year and 3 this year.  Similar models in garden centres cost 4 times as much.
Our water is metered and last year was a drought year but we were pleasantly surprised by the water bill racked up watering all my treasures in pots because I couldn't get them in the ground.
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Our water is metered and last year was a drought year but we were pleasantly surprised by the water bill racked up watering all my treasures in pots because I couldn't get them in the ground.