The price difference between the two always made me go with the WiFi only model. Spending $200-$300 more on the LTE edition isn't worth it ..... mainly because I never if ever use it. I have strong WiFi at work, home, college, church, hotels, parent's house, friend's houses, starbucks, etc..... If I ever did need WiFi I just spend 5 seconds turning on a hotspot on my iPhone and bam, good to go. I'll maybe do this 2-3 times out of the year.
I was given an LTE iPad Mini 2 from Amazon by accident (they told me to keep it) for the price of WiFi. In the end it became more of a hassle because it was eating data from my family plan and spending $10/mo + tax just didn't seem worth it for something I didn't use.