Aromatase inhibitors generate a fair bit of negative press as they can have some really unpleasant side effects. For some people. They are also prescribed at the end of what can be a long, gruelling and damaging treatment regimen when many of us are struggling with recovery and are already feeling battered and run down. That can amplify any negative issues.
One of their more notable effects is that they significantly reduce the incidence of recurrence. There are never any guarantees, but they do a pretty good job.
If it's recommended, why don't you give them a try? You can always stop taking them and there is no evidence that any side effects are permanent so there is little to lose. Mxx