Product review (4 stars): Convenient for light drying.
So this is a ~$100 clothes dryer, hence I don't expect it to perform like a $1000 major appliance. If you need a full size dryer, this won't do.
This will take a small amount of clothes that you can hang loosely and gently dry it. We mostly line-dry, but in the winter, heavy fabrics can take a while. As others have mentioned, it's quiet and relatively efficient. As long as you don't pack clothes too tightly, it does a decent jobs of drying light fabrics and speeds up drying of heavy fabrics. synthetic shirts are dry in about half an hour. Cotton blends can take a couple of hours. Heavy cotton fabrics (towels) might not dry completely in the maximum 3 hours available on the timer, but it's much faster than not having any assistance.
There is no real feedback control, it's just on until the timer runs out.  I tend to run it in half-hour increments, removing garments as they are dry.
Drying performance relies on having airflow around the fabric, so it's important to hang things loosely.
When on, it consumes 800-850W continuously (measured with a Kill-a-Watt meter) and pumps borderline hot air into its environment.  We have this in our living space, so in the winter, the heat helps to warm the house. It's basically like having an 800W space heater. Don't really need to use it in the summer, but if I did, it would probably go into the garage to vent the heat. I can't really tell if this is any more energy efficient (on a per pound of laundry basis) than a regular clothes dryer. It is certainly quieter and gentler, and it's easier to justify using when you have only a few things that need drying rather than a full load.
Light and moves around easily on casters (two locking to keep it put when needed).

Drawbacks:
Construction is kind of flimsy. One of the metal tubes arrived bent slightly out of round. Easily fixed with pliers.
The assembly instructions were for a different design, but there's really only one way that this can be rationally assembled, so again, not a big deal.
It takes about 10 minutes to reassemble once you take it apart for storage. So not as convenient as a folding drying rack.
Can't handle any real big items, like blankets, but I might be able to kludge it by removing the shroud from the top half and placing the blanket there. But you have to be careful with venting to prevent overheating the blower and creating a hazard. Will experiment this winter.

Unknown reliability at this point.