Hello,
As usual you can find positive and negative reviews from actual users about all sensors available.
Let us say you have the Guardian 4, The Simplera, the Instinct and a totally new kid on the block.
There could be different reasons why one would work perfect for me and lousy for you, the reader. Something like living in a tropical country or in Scandinavia,cycling 25 kilometers to work 5 days a week or just leave your house to go shopping at a 5 minute walk, being obese or kind of skinny, being a vegetarian or having cola with every meal.
IF the majority of users are positive about the Instinct i will give it a try. MAYBE the first few months after arrival in Europe the manufacturer will succeed in making it more '' reliable '' if that is an issue.
We should remember these manufacturers are all companies and they are around to make money ( just like these companies who want to make you believe that a smartphone needs to be replaced after two years) BUT they understand once all you read about is problems they will hopefully try to improve things.
Greetings, Eduard