I didn't use it yet, mostly because I've never had many crash problems.
0.4.9 crashed about... 3 times? And two of three times were because my HDD wasn't properly connected anymore due to the SATA cable being squashed between the gfx cooler and the motherboard (stupid SATA connector positions).
I considered using it in 0.5 due to more frequent crashes now but I suppose I'm not the only one with that problem.