I have this: https://www.amazon.com/dp/B011L8WJIA/ https://www.amazon.com/dp/B011L8WJIA/ I'm very satisfied. Not coming apart is a significant feature. The cas

I have this: https://www.amazon.com/dp/B011L8WJIA/ https://www.amazon.com/dp/B011L8WJIA/ I'm very satisfied. Not coming apart is a significant feature. The case is nice too; I've used it several times to look at the back of my head. I haven't found any blades that don't work. As far as I know they're all the same.