Are there any other major features the 540XXL has that the 340TM does not? If not, I think I might try to go pick one of these up tomorrow. The 340TM seems to have the key features which I've highlighted in red below. Best Buy has honest and unbiased customer reviews for TomTom - XL 350TM 4.3' GPS with Lifetime Map Updates and Lifetime Traffic Updates. For more info and tutorial check the comments OLD TomTom GPS 12:00AM Clock Reset Fix, Don't Throw Away Your. So what are the major differences between the 340TM and the 540XXL? Obviously the size, but I actually don't want a 5' screen anyway, so that part I'm okay with. 4. In this tutorial I will show you how to install a free map for TomTom devices.
