My semen rep has went thru 3 of the MVE shippers in the last 3 years and is now promoting the Wortington tanks that seem to be lasting longer for him.

The inner tank hangs from the neck and bouncing around in vehicles will eventually crack the neck which will release the vacuum and drastically increase nitrogen consumption to the point a tank will only hold days or hours.  Moving them around is one of the hardest things on a tank.  Ours has been moved once since we purchased it and that was moving from the old barn to the new barn.