I have the most expensive TruCut Electric they make and have had it several years. I also have bought VERY few blades in recent years because the sharpener works so well. I recommend not letting your blades get too dull before sharpening. And if your blade is too far gone no amt of sharpening will help. If mine died today I'd reorder a new one so fast it would make your head swim.
I must admit though it is noisy and you want to put a drop or 2 of sewing machine oil on the grinding stones before using them.