Product review (1 stars): I have owned two.  Both broke.
I did not buy mine from Amazon.  I bought directly from the manufacturer.  The sales pitch for the high price is that these are not "cheap units manufactured in China" but that they are made from quality components.  I talked to the owner, over the phone, before buying mine.  But regardless of the sales pitch, I have owned two, over the years; and both broke.  Now I am out of hundreds of dollars.(I bought mine, back when they cost less than $400.)  Herein lies the problem.  Because it spins so fast, the load must be perfectly balanced.  The load must also be sufficiently compressed, so it is at less risk of catching at the lid, as it spins.  If either of those criteria fail, then this unit can break in an instant; and when it breaks, it can be violent because it is spinning so fast.  But if you have a "magic touch", then maybe yours will last longer.  The unit does serve a very useful purpose for which there are few alternatives, if any.  It is just unfortunate that it cost so much and that it is so unreliable.