I had DS2 in the bath at Selangor and I found that the bath was only just deep enough for me - I wanted to be completley submerged 'cause I couldn't deal with being cold and pain at the same time. So for me extra foam bits would have been a hinderance. There are handles on the sides of the baths to grip onto (I think).

I was in the first birth suite as you walk in, not sure if the baths are deeper in the other suites.

Good Luck!