Our health insurance for a family of 3 was much cheaper in rheinfelden than in Basel Stadt it dropped from 650 per month to 400 or so with the same company and identical cover.
My taxes went down by 8800 per annum in Aargau
NB the above figures are approximate
My wife shopping bill dropped by a lot more

as she had to take the rain to the city approx 15 mins 2 x in one hour
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