I have 4 DNA200's. I've never had a single problem. If I had a SX Mini that failed, should I then say they are terrible because I got a bad 1? Most of the early DNA200 failures were do to 3rd parties improper installation/handeling of the chip imo. Also, you will hear of more failures if more chips are in circulation. If there are 10 times as many out there, You could have 10 times the amount of failures and the failure rate would still be the same! I would really love to see some actual statistics showing failure rates between the different chips.
Cheers,
Steve
Edit The one thing I do agree with Vlad on is, if you are unfortunate enough to encounter a problem, Evolv stands behind the chip for 1 full year and they are in the USA. I've heard of them replacing chips even if it wasn't the chips fault (faulty installation, etc). Really a great company to deal with.