Would you mind elaborating on your experiences? I would love to compare notes here, especially for helping to prepare my own set of long time rpgers for the Cypher system.
The biggest one is that your attribute pools are also your hit points. It uses resource management to represent fatigue. You can also use these pool points to lower difficulties. Then you roll the dice with a need to match or exceed.
The math, though, is subtracting a 3 and then maybe a 2 and another 2 off a static pool. After a while, you can pretty much remember the numbers, never mind the numbers get smaller and smaller.
Which, in theory, is easier than adding a 2, and then another 2 and then a 4 to a dynamic dice roll. But it seems to trip up long-time gamers who are used to adding everything to the die roll as the numbers (and math) gets bigger.
Some aren't fans of those attribute points also paying for their special abilities. But after I explain that spell levels are already resource management and that healing potions are just extra hit dice in a bottle, some can see how Cypher just boils down three different systems into one system. As I mentioned before, players new to the hobby don't seem to care either way, it's the long time players that get themselves confused.
Using your XP for both advancement and Luck points has also been a stickler for some. In theory, players would split their XP between both options. But there seems to always be someone (usually the guy who's not very into the story -- but not necessarily a min-maxer), who will endure every fumble and GM Intrusion to horde his XP for advancement and then shoot ahead of everyone else.
In the book, they offer the option of splitting up XP options, but I just use milestones anyway.
And while no players I have run are bothered by player facing dice (in fact, I think they like it when every roll is visible to everyone), some GMs like to do their own rolls.
The only other thing is that Edge and Effort do two different things, but people seem to mix them up since they both start with "E." I usually have my players denote the Edge as a negative number to remind them that it is a discount. And the most common newb mistake, regardless of experience, is trying to subtract Edge from each individual thing you spent your pool on (Effort, special abilities, etc.). The easiest way to remember that you get your edge only once per dice roll.
What are your experiences with using the Cypher system?