The Bristol TS or "Twin Single" compressor has been around long enough now for you technicians to have some opinions. How do you like them? Are they lasting? Are you having any problems? What do you think of them in general?

For those of you here who are not aware of the TS compressor, it is a two cylinder reciprocating compressor when operated in one direction and a single cylinder compressor when reversed. That gives two stages of cooling capacity, 50% and 100%

York uses them in some of their products. Who else?