I did a few purchases with such an ATM in Canada, for small amounts, 20-40$ CAD each time , with fees more expensive than I would have liked, but I was OK with them due to the ease of use. The speed was decent (less than the time it took to walk back to my workplace).
I may try again soon, because i'm really curious about the speed now, considering the 200k transactions backlog that's currently happening.
I seen a movie where guy does whole transaction in less than 30 secs :)
Recently ? Perhaps the higher BTC price in those machines do include a higher than average transaction fee (I sure hope so!).