Shouldn't be a problem - because the 'spot' isn't an actual spot any more. The linear association between physical location and logical blocks just doesn't exist. Repeated writes to the same 'spot' will still march through the disk as blocks are allocated. SSD's in Tivo's are like any other "I want to try this, because I want to try this" subject. If you want to try it, go for it. There's no ROI to compute. Every time I swag the numbers, it comes out to an expected life time of ~5+ years on a six tuner box on comcast. And if it dies before that, or after that, you replace it.