Its definitely a great card designed by Konami.
Its really balanced out, with a somewhat hard to fulfil cost and an amazing effect.
Its like a ROTA for any level 4 monster.
If only there are better “Resonator” monsters to play in our current meta.
Maybe Konami might print out some broken “Resonator” card in the future, seeing as how they are giving support to many archetypes.
Anyway, Barrier Resonator seems pretty strong too, being able to protect your tuner monsters from getting destroyed by battle and even preventing you from taking the battle damage.