Oh man, sorry to hear about your receiver. Impressions vary, but for me, it's a crisper sound and the different sound sources are more defined. I close my eyes and purposely lose track of which effect is playing. I found the switch delay between the effects distracting, but the difference in effects is quite noticable.
I qualify my statement with the fact that sound perception is probably the most hotly debated issue in audio. For example, who makes the best speakers, best receiver, amp, cables (okay, cables are a scam), ad nauseum. Don't get me wrong, there is junk out there, but if a person likes what they hear, they should buy it.