If you are debating on whether or not to get this heater, just get it. You'll be so glad you did. It literally does everything it says it does. Although, I haven't heard any crackling sounds it performs all other functions as intended. I was looking for a space heater to replace the one I'd been using in my motorhome seasonally for the last 5 year or so as I like to keep the space heaters I use up to date in there especially and wanted something with all of the safety features, energy effecient with multiple heat settings.The added benefit with this one is the fact that all can be controlled with my phone!!! OMG! That was the real determining factor in my purchasing this one. After reading the reveiws most, if not all of which were favorable I decided to take the leap and wow! I LOVE THIS HEATER! I can turn it on, set desired mode/temp and lighting feature PRIOR to going out to the RV (here at home in the driveway). I am also then able to monitor its performance right from my cell phone or whatever device your using to control the heater. One thing to know or remember, however. This heater doesn't come with a separate remote or controller. The only method of control is via your cell phone (or similar device) or the controls located on the actual heater. The heat produced is fantastic! Each setting doing what it's supposed to do. The sound is also minimal in comparison to many space heaters I've used in the past. The lighting features are also nice and adds a little 'something' to an otherwise normal looking space heating product. Again, all lighting features can be controlled from your phone.I am very pleased with this product and will continue to look for other products this company produces. My roomate bought their interior lighting strip to use in the den around the room (hidden lighting) due to it being also controlled by his cell phone (or other similar device) a fewyears ago and he hasn't had a single issue and I expect the same from this. I'll keep you posted.