Arrived unable to find it. After being told it was near the lake we found it was actually ON the lake; an actual raft.
Stayed 1 night...owner spoke perfect English...very helpful. Food/restaurant was superb (loads of choice and cheap)
Rooms basic with a poor fan but if you're looking for somewhere cheap, rogue and different to stay maybe on your way to the Phunamron Thai-Myanmar border crossing (as we did) it's absolutely perfect (15 min walk from bus station in Karnchanaburi) with an awesome chill out area and array of wild animals who the couple owning the raft feed regularly. More people need to see this place as we were the only guests and it didn't look like more were swarming there