Sure, we used to have one in our house and slept in at night. It was very relaxing to float in, and was great for aligning our back, because our back almost always popped after floating a while, but it did not help us at all with lucid dreaming or obes, although there were a few times that it felt like we were trying to leave our body, but just got pulled back in.
It was somewhat distracting because all we could hear was our heart beating really loud since our ears were under the water while we floated. We never bothered to set it up when we moved several years ago, because of the expense and hassle of setting it up, as it needed about 800 pounds of epsom salt in the water to allow the floating, and the water had to be kept at just the right temperature which required several water bed heaters.
Even if a person were to have a great experience while floating in a tank, by the time they got up out of the tank and took a shower to get all of the epsom salt off of them, and then sat down to record their dream or obe, they would likely have forgotten it. So for us, it's just not worth the hassle or expense of maintaining a tank.
