Yes entellus has proven to be a strong competitor. However, there is no way in hell MDT will ever take over the market, or even take a significant percentage. First and foremost, MDT is trying to compete against companies that specialize in balloon dialtion. I don't take my car to Sears Auto Center to have my transmission fixed. The MDT reps are complete idiots when it comes to balloon dilation. Their entire protocall is based on what they have been able to copy from Acclarent and Entellus. The MDT balloon is also a joke. Regardless of navigation, does MDT really think that it's design can produce a high success rate? If NASA were to attach a rocket and navigation to a Red Wood, would MDT call this a space ship? Yes I understand that MDT will take some space in the OR ... blah blah blah, but the office is where the real business is. MDT thinks they will squeak their way into this market with competitive pricing and the possibility of placing a navigation unit based on volume. What MDT doesn't realize is that most high volume office physians think that navigation for balloons is a joke. And if we enter some sort of alternate universe where navigation does become popular, Acclarent and Entellus will simply add navigation to their balloons.