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Product arrived missing some parts but the Burley customer service was quick to send me the quick release axle and wrist strap after reaching out. Overall the product is much sturdier and easier to turn than I expected after reading some of the reviews. Use this on my D'lite and easy enough to turn with a three y/o and an infant. Pricey but beats buying a double Jogging stroller.
Works great. I use it often. It took about a quarter-mile to fine-tune the tracking of the front wheel the first time I installed it. I haven't had to adjust it since then, even after uninstalling and reinstalling many times. I'm using it with a Burley D'Lite Single, 2020 model year.