Arnoldo and his assistant were excellent. Arnoldo was clear in what he was doing, straightforward, and honest. We hired him to assess (and fix!) the wiring in our entire house. He advised us when he found some bad wiring that should be fixed, and he refunded us money when the work ended up taking less time than he originally estimated. Aside from checking the grounding throughout our house, he also installed a new breaker panel and bathroom fan.
I've already recommended Arnaldo to other friends; he's the electrician we'll call first from now on.