I gave very few disadvantages/concerns simply because I didn't really have any. The only thing I really have any concern for is the price, but one must also remember you are getting a very fine piece of equipment made by perhaps the finest name in elliptical trainers. So essentially you are getting what you paying for.
Whether you are looking for an in home unit or looking to house a number of ellipticals in a gym or health club, I would certainly take a hard look at the 556i by Precor.
All the best,
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