How well does this do in heavy wind?

Reviewers have reported using it successfully in very stiff winds (up to 50 mph) but it's not intended for near hurricane force winds like that, and in conditions anywhere near that it is imperative that you have it pitched well with robust stakes. You'd want more substantial stakes than the stock ones which are really suited for firmer soils and normal weather. Overall, the tent does reasonably well in high winds for a trekking pole shelter because it doesn't have any vertical side walls and it spreads the load over two trekking poles instead of one, but it's not a 4-season, extreme environment tent. It should take anything you encounter, but use appropriate stakes and choose smart campspots.