Yes, I have used two sets of these. When they first come out, they were the only dropped spindles that did not increase the track width from the stock drums but since then, they have released other ones that don't increase the width. The biggest thing I liked about these version the 2.5" drop ones is, if running a stock type 15x8" wheel with 4.5" BS, they allow the wheel to clear the lower outer lip of the A-arm. The bigger drop spindles can run into clearance issues.
Side benefit is, if you ever want to change your brakes out to a big brake kit, this is the spindle almost all of the kits use, since it has the mounting points to change caliper brackets.
Here's the clearance I am talking about,
