Many thanks
Will review the Pullman and Mercure - stayed 3 days in each - Mercure the best choice by far. TBH the Ibis Styles ( same GM ) looked good too - and on beach - authough "beach renovations" are underway opposite.
Tip
Take the ferry. The drive is about 3h no traffic and 8 h traffic - Sunday night! ( Grab 1.5M Dong )