I've had excellent results with the Shimano narrow chains for my 3x9-speed commuter over the years. These chains perform for extended mileage, I typically get 8000 miles for a drive train with Shimano chains during year-round commuting. I'd like it if they came with more than one connecting pin, or packaged together with a quick link, but those are available separately.
I bought the bike used with the chain already on the bike. I do not know how many miles it had on it when I got it. I have put 10,000 miles on the bike with the chain with routine cleaning with Simple Green and lubing with Purple Extreme with less than 34% wear indicated using chain measuring tool. I clean and lube every 400 miles or so and more often in wet riding conditions. Main use of the bike is road rides.
I highly recommend this chain.