I have an older HHA 3 pin slider on my back up bow. I purchased it in 2011 or 12 and loved the versatility that it allowed me. I was able to set it up so that I could use all three pins to eliminate the pin gap method for certain shots (pins set at 20, 30, 40 then moved to shoot 25, 35, 45). To shoot at longer distances I used the bottom pin as my floater. I liked this set up so much that I went looking for a HHA 3 pin and couldn't find one even used. I ended up going with a MBG ascent Verdict but that's another story. Here's what I like about the HHA 1. close and compact design (good for hunting in brush and tight quarters. 2. bright pins and adjustable for brightness 3. set up for lens if you want it. 4. fairly easy to move or adjust when hunting and game is close (I had it so I took one arrow out of quiver to access the slider knob) 5. set up with the sight tapes was easy ( I created a custom one or modified one that was close).
Dislikes: None really, I do think that the sight radius gained by my MBG allows for more accuracy. In fact there are some features the HHA has that I wish me MBG had.