Bangkok On your own overnight

We are on the Celebrity Millennium, and taking their shuttle into Bangkok, staying overnight.

Has anybody taken the Millenniums overnight shuttle? What time did they pick you up to come back to the ship? Our ship leaves at about 5 p.m.

We initially were planning on taking this option, but then investigated private tour companies that weren't that much more than X's 'On Your Own' tours. Glad we did, couldn't fault the 2 day excursion we took with BKK Tours - Ms Air was fabulous.