Yeah I also HATE the hassle of filling it and breaking your back trying to pick it up...
We havent had a choice in this house though, as we don't have a big bathtub. So we have rigged up a system with some tubing that directs water from the bathroom taps straight into the baby bath.
Plus there is a plug at the bottom of the baby bath, so you can empty it down the drain in the floor, so you don't need to pick it up (and break your back!) at all.
Aidyn is getting rather big for it now, and is too long to lie down in it, so soon we might move him onto having showers. Which is a pity though, cause he loved playing with his floating bathtoys so much!
We also bought a little paddle pool and he had his baths in that quite a bit during the Summer, and we could sit in there with him then.