Most transactions have been close to the estimated trade amount, but I got 7.5% fewer coins on this last trade than estimated. The transaction also took 70 minutes while it usually takes 30-40 minutes. The fee was also over 10 times higher than usual. I don't know what happened, maybe it had to go through multiple trades, but I was disappointed by my last transaction....after reviewing my transaction, they acknowledged a technical glitch a refunded the fee. I ended up with about the original estimate.