I've got the 300 GPD one from Freedom.
I run it into a 1000ltr IBC tank and use a transfer pump to get the water to my van tank. I used to use my 40 inch on board RO which was fine but I hardly use any resin at all now. My waste to pure is around the same at 1 to 1 as well. Yes I know you can cut the waste to pure on the 40 but it b*ggers your membranes up if you do
I know this because I did it
I use 4 to 500 ltrs per day and it more than keeps up with me.
Its a great unit and I cant fault it at all. You are on better water pressure than me as well so it will work even better for you.