Out today trialling my Ortovox , German thingy locator.
No probs at all.
Nice size and easy change battery and on off switch.
The gear is all the same frequency, so if you buy Ortovox, Barryvox or Pieps it doesn't matter.
They all have the same warranty, they all do the same job and it's how you get on with them that matters.
The way you attach the Ortovox locator to your collar is the only stumbling block for those of us with no imagination.
Like I said, tested today in a big spot and found the terrier easily.
Cost versus a B&F set, for my stuff about £50.