Whether you get the Ulterra with the Mega transducer or universal sonar the TM functions are the same. I have the latest gen Ultera with universal sonar.....I had the old model Ulterra also. I have had no issues with the newer version...I have owned it for almost 3 years....and it gets used a ton. I am going to give you some facts about all of these GPS trolling motors....no matter the brand. For each person who sings the praises of brand X or brand Y you'll find someone who has had major issues. I know folks who have had issues with their Xi5 and Ulterra from the day they got it..and can't get them working right. I know a ton of folks who loved their 1st gen Ulterra yet my first one was a pain in the rear. If my Ulterra quit today I would go buy another one. It is safe to say the new Ulterras are on whole far more reliable than the 1st model they came out with.
Regards