I have an old Strike Sensor that still works, I think it's about 10 years old. I did pick up one of the BlueTipz this year, with the receiver. I tested it out this last weekend and I couldn't get the alarm to play on my smartphone. Whenever I went into settings and tested the alarm tone, I'd receive an error that the application stopped working. I cold booted my smartphone and it still wouldn't work. But it had worked fine when I picked up the unit 3 weeks ago. I got an update for the app yesterday and the audible alarm is working again.
I didn't get any flags while I was fishing to test out the range. I was sitting in my truck and wondering how the signal would be. I had the receiver sitting on my dash as well. I'll be using it again in the next few weeks and if it works to my satisfaction I'll probably pick up a second one.