Default how much of a difference will tuning the baseband make?

For some reason(i'm on windows 7, running in compatibility mode) I can't get mauimeta to function properly. I'm having a hard time tuning my baseband. Is it a night and day difference, or only slightly better with a tune? If anyone wants to help me troubleshoot, when I open mauimeta, I get the error "create meta sp dll log failed, please change path" and no matter where I change the path too, I always get this error. When I try and connect my omate, it never makes a connection to the program. If it's not that much of a difference, I guess I won't worry about it, but if it will make a big difference, I'll troubleshoot further until I can get the tuned baseband on my watch! Thank you for any input!