We got the largest one available and have had zero issues using it. Easy to dump into. Easy to pull, my wife did the pulling because she likes stuff like that. Go figure. Easy to dump at station. I've seen tons of people on here stating they would never use one for various reasons. That's their choice. For us, Works fantastic. We have 4 adults staying in the trailer and it does produce some waste. And that's one of the reasons we got the trailer, to use the bathroom when we want.
And yep, we've used it for gray and black. Again, no issues. Have had zero spills or smell problems. Travels in the bed of the truck when going to and from camping. Again, no issues.
I'm 52 years old. Have had no problems with picking it up and moving it around here and there. Yeah it's big and bulky but empty not that heavy.
We like it. Works for us. That's all I can say about that.
