I'm very happy with my solar charger, so far no issues at all. I already had tensile wire fence up, and I just electrified a couple of lines of it. Had I been able to I would have gone with tape, however, I like the visibility.
One piece of advice my installers gave me, is always go with a much bigger charger than you think you will need - ie if you need a five mile, get a ten mile. Less of a problem in plug in chargers, but in the solar chargers, according to my fencers, they have only JUST enough juice to make the circuit based on the mileage - if you want a worthwhile zap go with a stronger charger.