I've had it for about 5 years, I use it all the time, and only have positive things to say about it's performance. Changing the blades is another story. I always dread replacing them, because it takes quite a while to get everything aligned.
I found a simple method that works works really well, using a couple of magnetic tool bars.
Before removing the old blade, I marked the highest point of the cutter head on a speed square. Anything flat object would work for this.
I pull out the old blade and put in a new one, aligning it to the mark. I set the bars on the out-feed side of the jointer, and they hold the blade in alignment to it. This sets the blades at the right position for cutting. I tighten the two inner bolts, remove the bars, then tighten the two outer bolts.
It takes about 5 minutes per blade.
These magnets are really strong, which I think is the key. They hold the blades tight with no slipping while I'm tightening the bolts. You can buy a magnetic jig for this at about $30, but these were already in my shop - and cost $4 a piece on sale.
Harbor Freight no longer sells jointers, or replacement blades. I found a set online that works fine:
POWERTEC 148030 6-Inch HSS Jointer Knives for $15 a set on Amazon. I'm going to try to sharpen my old ones, but I don't want to take the time to do that right now.