Can't say I've ever bought a cue whose quality held me back from my shooting abilities, and I've bought a lot of them. I've never had to return a cue for a defect, finish, warped shaft, pin not centered, or anything actually.
Some really nice cues I got early on were when I went to Brunswick in Bristol Wis to buy a pool table at their yearly clearance. You show up on a Saturday, pick your table, backup your pickup and they load the pieces. Heck of a deal, you would get a $3000 table for about $1200. They had tote bins of cues for $15-$25 that were really nice.
Anyway they put the wrong slate in my truck, gave me slate without wood edging, and I didn't notice till I got home. I immediately called but didn't expect anyone to answer as it was a half hr past when they said they were open. The head of the place answered and I explained what happened. He told me he was really sorry and asked if I could come back on Sunday and he would meet me to change out the slates. I only lived about 30 miles away so said no problem. We exchanged the slates, and he felt so bad about it he told me to pick a couple cues out for my troubles. He said I could pick from any of them. I saw one I really liked and asked if it was ok, he said take it. It was a beautiful Joss Brunswick, didn't know what I really had at the time, just liked it's looks. Incredible cue for free.