Remote installation is the best option. I don't have an RD in my car due to CCW. Bel Sti-R is expensive and installation is also expensive especially at the dearlership given it takes at least 4-5 hours to install. I would trust my car with an outside installer.
Even the Sti-R is not going to save you from a multonova b'cos of the angle in which they are set up ... 30 degrees... which means unless there are other vehicle or objects around it, by the time the RD picks up the signal it's too late.
Save the money and drive sensiblely and you will be fine.
