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I've got the Connectors (only because they were going cheap at Ribble, they are fiercely expensive) on my Gravel bike.
They aren't half as bad as that review would have you believe. They work well on gravel and even wet and muddy stuff, granted I wouldn't want to ride them on the road exclusively but they don't feel any draggier than anything else I've used.
I like the look of the Urbans with the coffee sidewalls for my Galaxy as I don't want Gravel tyres per se and I don't want Marathons. Its the halfway house.
I did like the look of the Terreno Zeros but once you start reading reviews it puts you off off all the things.
According to bicyclerollingresistance.com the Connectors are only good for restistance training.
Contact Urbans are my favourite - GP Urbans if money was no object.