I bought the RPI, liked the look of the sense hat and bought it, before finding about the heat issue.
Last few days spent finding a way of cooling, with a hat 'mounted'.
Parts on order.
1. Various stand off's, 2.5mm
2. NF-A4x10 5v 1" fan, driven from ob usb.
3. M-F 40w ribbon (rt angle fold to align pin 1).
Knock up, Sheet plastic to (somehow) keep it all together (it's for a birthday present).
RPI and Hat work together. Python cod no problem with that tested - should be a good intro!
Niggles: Ubuntu and keboard - bought an RPI keyboard, Ubuntu doesn't have it listed. Set to generic. Hunting for # was a nuisance.
Updates, wifi, screen all worked out of the box.
Really quite impressed.
Except for the heat issue - I hope someone was .... reprimanded for not testing the system.