I used a normal baby bath at first, then when the little'un got too big (and wriggly) to lay down, but couldn't yet sit I got a tummy tub. He loved it
He did often stand up - seemed to depend on mood, but was often happy just to sit in it and play. I have heard it can be hard to wash a newborn in it, and I did find it was hard to reach his nether regions unless he was standing - so good for a soak and playtime but not always ideal for a proper wash - which was generally okay as we don't soap him every day anyway.
He's just over a year now and we stopped using it maybe two months ago. He would stand and lean and it got to be we were always catching either him or it. Now he stands (and sometimes sits) in the big bath.
I got it off TradeMe for a good price, and was well pleased I got it to cover that middle period. Hopefully I get even longer out of it with the next little'un!