I have a Waeco and recommend you do a search for poly fuse issues on Waeco. Gives you an insight to them. The service center I took mine to the other week to get fixed had 20 odd lined up to be fixed. This is what made it stop at masters last time I used it

They also are one of the most sensitive to low current from your battery system and shut down.

The ARB one gets good reviews but have no experience with it. I would pony up the $$$ and go straight to the engle