This product is great! It’s not as warm as a jacket, but it’s still warm enough. If you prefer a better fit, you could go for a smaller size, but I found my regular size to be much more comfortable and allow for more movement.
The labels on your jacket can dig into the heated jacket, especially when they use thicker thread, causing marks and damage (just after 1h ride). I’ve removed all the labels from my main jacket. The material isn’t as strong as on the extreme version. (See photos)