We have a safe t plus and it's awesome. It's like a different RV now. Stays right where you put her. I ordered direct from safe t plus and they were very friendly and helpful. Safe t plus is a little more money but has a lifetime warranty. That was the deciding factor for me.
After speaking with the folks at Safe t plus, I know there will never be any hassle with warranty claims. Sometimes you can just tell when you speak to someone that they are gonna do you right. Either one should make a huge improvement. Good luck.