I've read several reviews that say cheap motorized screens are unreliable. However, Elite Screens is a reasonably reputable brand, at least for home use. The reviews at Amazon look pretty good for the Elite 125" electric screen. Reviews for Favi look good but I don't know much about their reputation.
However, if an electric screen breaks - how are you going to repair it? They are bulky and expensive to ship. Same is true of pull-down screens, but the roll-up mechanism is less prone to failure than an electric motorized system.
Given that 13 out of 109 (12%) of reviews were bad (1-3 stars) for the Elite electric screen, that implies 88% are positive reviews (4-5 stars). it may be worth taking the chance as you could buy 2-3 of these for the cost of one from the well-regarded electric screen brands. As an example, the Da-Lite brand motorized screens go for $665 and up into the thousands for motorized screens; but theirs are considered industrial-grade and suitable for use in businesses, commercial venues, etc. They are built to last.
About two years ago, I paid a little over $300 for a 120" Elite brand, 16:9 fixed-frame screen. It's cheaper to build a fixed-frame than a motorized screen. That is why my initial reaction was to think that a 120-125" motorized screen for $250 is probably too good to be true.
Given the massive price difference, if you're willing to take the risk, go for it ... but I'd be prepared to buy a second one if there are problems with the first. (Don't order two, just set aside $250 in savings in case you need to replace it.)