Questions for those who switched to EFI...

The first, most obvious, question is, "Is it worth the money?"
I know not to expect a noticeable increase in power but, does the driveability improve enough to make the conversion worth it?
I've been thinking about switching to the FAST EZ-EFI set up.
We have some wild weather swings in northwest Arkansas. During the summer, it gets to the high 90s and low 100s, with humidity to match. During the winter, it is not unusual for us to see sub-zero temperatures in January and February.
I've got the Holley 750 on my 340 dialed in pretty well for when the temperatures are between 50 and 85. But, on either side of that range, the car is a bit finicky.
In the hot months, the gas evaporates out of the carb in just a couple of days, meaning I have to crank longer than I'd like to just to get it to fire.
If the EFI means quicker starts and better overall performance I might have to start saving my pennies.
Is EFI a worthwhile conversion?

Thanks.