Peloton bike+ - I got suckered into the hype but 84 rides in 9 weeks and it truly does live up to it

Garmin Fenix 5 - Ok this was actually 4 years ago but still it was first to mind

Hive heating - Again, 6 years ago, but my partner and I use this all the time through the colder months. Being able to control the heating from your phone when you're an hour away from home is delightful