I've used these chainsets on a couple of different bikes for years now. The quality is good (trekking grade), the price is very reasonable, and they last a long time. Gear changes work well, as you'd expect from Shimano. The previous chainset lasted 7 years of usage, riding several times a week in spring/summer/autumn. Scrape the gunk off your drivetrain occasionally, and replace old cassettes/chains when they become stretched, and this will last you for years.