I have "RVlock" brand it has work pretty well and overall I am satisfied with the unit.
I have had it about 4 years.
My complaint is overall it may not be robust enough. It is not able to handle normal use.
I camp a few times a month. From March thru November. I do not full time. I do not consider my use excessive.
I have had to replace my key pad and the main circuit board. The parts are available and replacing them was not too difficult or expensive.
Customer service to diagnose and ship me the parts was good as well.
Nevertheless I'm not sure these basic components should have failed.
I am a DIY guy. I'm not sure the average guy would want to disassemble the unit and replace internal parts.