I finally just got my new SmartExtruder+ (v13.0 model MP07325) and updated my printers firmware to 1.9.2.505. Well...it is an improvement I think. The leveling now works, where as before on the old extruders (v12.X versions) the leveling almost never worked, you basically had to manually level it because the touch sensor in the extruder didn't work right. So my first big print on the SmartExtruder+ (30hrs @ 0.1mm resolution) and it jammed 3 times, real jams, I had to unload filament and reload it, and then I could see a small shift in the print for every jam/reload I did, so that wasn't good, and I don't recall the shift happening on the v12 extruders (But at least the jam detection works good and it didn't pause for any false jams like the v12 extruders were notorious for). But I noticed it didn't jam at night, only in the day when it was warmer. So I ran the same print again and this time opened the window so the room would stay cooler, and this time it didn't jam at all, completed 30hr print with no issues. The print quality was pretty good, had a couple dry spots on some large flat surfaces, but other than that pretty good. I did the print one more time to test my temperature theory and I found that it only seems to jam when the room temperature is above 67 degrees F. So overall I think the SmartExtruder+ is an improvement (but original extruders were really bad to start with), and if it had not jammed at all then I would say it would be an amazing improvement....but it did, and if it can only print in a sub 67F room without jamming then that is going to be a big issue in the summer. I will continue to test this, and if it is true, then I will call MakerBot because the printer spec says it should operate up to 90F ambient temperature. If Makerbot fixes this jam issue they will have a good printer.