True and True
There are 2 main disadvantages of bath bleeds -
1 - Identifying leaks is hard cos' everything so damm wet (although it can make it easyer because the water "spits" away from the non air tight part, but I'll excuse you if you don't notice that)
2- You can accidently put a shit load of air in without realising very easily, I've bled brakes in fountains, swimming pools.... etc, but even in a nice even bath I can f**k up too easily.