It is important to find a good way to bath your baby. I found more convenient to be upright so that I did not have to kill my back. I used a little baby tub that fitted in my kitchen sink. It was perfect.
We started using a "bath pillow" by Leachco when our baby was 2-3 months old (before we would hold her in the shower as we were showering). We have a hand held shower head and this pillow works beautifully with it. She's 8 months old and we still find it convenient. It's great for travelling as well.