I have a Gen 2 MES40 that I got from Lowes over a year ago. I've had decent experience with it but seem to have some trouble with the temps. The smoker runs about 20 degrees below set temperature and I've used a very reliable temp probe to compare. It always seems to be a guessing game too. Sometimes it's 20 degrees below and other times, it's 30. It's frustrating playing this game! I recently heard about the release of the Gen 2.5 BT version. I'm wondering if it would be worth it to upgrade. If so, should I get it from Cabelas or Sams? I don't have a membership to Sams but it seems like the price with/without membership is the same. Would appreciate your thoughts. Thanks!!