Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Ex Input:
Excellent product. I was having difficulty hearing and also getting a comfottable fit with the included ear hook that came with my Jabra JX-10 Series II Bluetooth headset. I removed the hook and attached one of the 6 gels that came in the pack to the headset and found that the volume increased 40% and I was able to achieve a comfortable fit. The headset is small enough and light enough that the gel holds the headset in the ear. I was about to give up on this headset (and all earhook type Bluetooth headsets) prior to getting the gels. If you are looking for a comfortable (and econimical) alternative for earhook type headsets, I strongly recommend that you give these a try. They are well worth the price.

Ex Output:
Positive

Ex Input:
I bought this set for my husband and brother for Christmas last year then we ended up buying a different set for the movie cash for the new movie. I went to sell this set at used movie retailer and they informed me it was from overseas and possibly a bootleg. WATCH OUT!!!!!!!!

Ex Output:
Negative

Ex Input:
I bought this to keep the inside of my RV from freezing up during the week (we use it on weekends). After a power-outage of about 30 minutes, the unit failed to come back on so everything froze up. Since we are prone to brief outages, this was not acceptable. I replaced the Delonghi with a $20 space-heater and have not had another problem.

Ex Output:
Negative