At my poolrooms we been using Simonis in all shapes and colors since we open our doors (1963/1988), but we made a change to that after Royal Pro started to make cloth for pocket billiard tables.
Its easy to clean, and its fast and it stays fast all time until we put new cloth on the tables, not like new cloth fast but much much better than any Simonis in the long run, no players in our rooms wanna go back to Simonis.
Royal Pro cloth has been made solely for Carom, but after lots of testing at the factory and in poolrooms now also for pool tables.
If you put spinn on a ball, play it 3 or 4 cushions, Simonis cloth makes the ball to start rolling after 2 cushions but Royal pro let it spinn like it is suppose to do.
At our poolrooms we change cloth 2 times per year after our cloth brand change, and its still cheaper than Simonis, so the cost for a table of Royal Pro cloth vs Simonis………is a huge difference.