Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointed it doesn't work with older cars

I am very diappointed that the Britax Regent or Frontier does not work with older vechicles. I have a 98 Grand Prix and my car is not equipped with the top tether. I was told by Britax that this seat would not work in my vechicle and you HAD to use the top tether. So there went my two options for a 5point harness up to 80 pounds...Does anyone use this seat without the top tether?