We have around 10 mics of this type in service running 8 hours per day on 7 5d
advantage: reliability, quality of reception
drawback: the price, the weight of the microphone (solid cast aluminum) sound very "dry law" the microphone and the price of spare parts (capsule) and the fragility of the rubber contact at the base of the microphone to say nothing of questionable ergonomics adjustment keys (without the lady fingers or a pen to settle the microphone, beware!)
good choice, but price not justified
before changing micro I see competition, evaluating offers from the market!