Instruct: Classify Amazon reviews into positive or negative sentiment
Query: almost perfect

I am using the AFT 100 for more than a year now, including long business trips in my car. The sound quality is reasonably good for a transmitter. The 3 frequency presets are very useful during longer trips. When you pass areas with different radio stations these could interfere with your "private program", so this feature provides you with the option to quickly change to a different frequency.The only reason why I just gave 4 stars is the sensitivity of the "auto-off" feature. When listening to music with quiet passages i.e. classic, the AFT 100 tends to shut itself off. As I mainly listen to audio books, this problem does not really bother me and I am very satisfied with the product.