Well I went to a big race and it was only my third outing with my car so I was ready for a full two days of fun racing.By the time my second qualifier came around I started having radio problems which made it impossible to drive my car.Third qualifier the same and in my E-main the same so all I got to do was pay 40$ and sit on my ass for 2 days without being able to run.At that point I said to myself I will not run again until I have that spectrum unit on my radio.For 150 I am at total peace of mind now knowing that it will never be an issue again for me so yes it is so well worth it.You can run your car to pre warm up your motor before your race as my Vspec needs that.TOTAL PEACE OF MIND