I have one, first use was a trip to Belize.  Would say that is it pretty
good for a back inflate.  I actually prefer a vest style, as I am used to
that in a my usual cold water.  However, no problems, once I got the exhaust
valve gaskets in right--were twisted from the factory.

Otherwise, very good, especially for the money compared to the Sherwoods,
which are the same company and cost more.

Regards, Dan