Reserve can be a really really good deal, IF:
Your airline/fleet/seat is properly staffed,
You live in domicile,
You don't mind having between little and no control of your schedule other than days on/off, *and*
There isn't a major IROP event.
The two months I was on reserve, I averaged 11 days of work per month as a bottomfeeder. Truth be told, it was pretty decent and a lot better than those two months would have been with a bottomfeeder hard line.