Without reading the previous comments I'm gonna say it's not over rated but rather, misunderstood. If a bow holds 2 inches reflex you might be happy until you realize it started with 5, meaning 3 pulled out. But then you got to also know, is that 2 inches of held reflex immediately after unbraced or after sitting overnight.
The ideal situation is this, and this is from my own experience. If you have a shot in bow, you want it to have the same amount of reflex from the moment you unbrace to 8 hours from then. If it gains more as it sits that means the wood was over stressed and its set that is relaxing, ungood.
How much the bow retains isn't important really when it comes to efficiency. If you put 10, kept 2 and it holds 2 after ours of unbrace, ya done good.