Sounds great! I have pre-ordered (among others) the Boron LTE 
I had pre-ordered the T-Mobile early access NB-IoT sim card until I realised it wouldn’t work in the electron. Great to see the Boron LTE should work with it 
ps. If you landed on this topic, it would be great if you used my referral link to preorder your hardware: https://particle.io/mesh?referral=BXWFEY 
Thanks a lot in advance! 