I'm an EE and design cryogenic process control instruments and software. I've also used these extensively. The completely encapsulated type are bulletproof physically, they are potted solid state electronics. There are others like the Carlo Rossi that are simply a small PC card snapped inside a plastic case, but I did not use those. Screw terminals see dielectric grease, star washers, loctite, and are coated externally with RTV. Yes, noise suppression is a concern, but from what I found playing with the Cannondale (and in general for that matter) is that if there is enough noise to interfere with the relay there are other issues at hand that should be delt with. The Cannondale had inadequate suppression on the starter solonoid, and the location of the mechanical relay made it prone to vibration problems. The fuel pump was also driven directly from the ECU (Sagem), which had a barely adequate internal driver, and many failed. I added an SSR to buffer the ECU and drive the pump and replaced the main mechanical relay, both mounted on a small aluminum plate under the seat along with properly designed suppression. Yes, the footprint of a properly rated device is larger and it takes some custom work. In the case of the 'Dale it was worth every minute, as it solved ALL the problems. Back in '02 when I did this I also helped a few other 'Dale owners out including another EE and they had similar success, so I know it works, its not speculation. Hey, maybe the FSE/FSR is fine but if I had relay failures from environmental or other causes for sure I would do this mod.