I have seen it on the road several times but never rode on it. Is there more info about it somewhere?

The bus has the route marked on it. Pattaya beach - Central - Walking street - Jomtien beach. Also the price is clearly marked, 20baht ( double the price of baht buses to keep baht bus drivers happy? ). Normal baht buses are often full in peak times so this bus can be alternative.

Never seen it , I've heard about it and if I just knew the timetable I would love to try it.

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I dont think it has a real schedule; it seems to just keep going round in a circle, rather like the bahtbuses.

As mentioned, usually completely empty but recently I have seen it full during the early evening lemming Russian migration period.

20B is the same price that one would pay to go past Central from Jomtien on a bahtbus, so for that trip the price is good value. And not exactly ruinous for shorter trips either.

I dont know whether it stops anywhere like a bahtbus or only at designated places.