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I would recommend steering clear of these programs. Beyond the potential danger if some SE decides the program is spam, it is almost certain that most of the links will be from sites with a theme unrelated to yours.
I'd suggest a targeted reciprocal link program - try to seek out sites with topics closely related to yours, preferably popular ones. Zeus software will automate some of the process, but you can certainly start off by identifying sites using the same search engines you are targeting.
The down fall is when you place an outbound link to one or start swapping link pages and all that kind of carry on.
If it's on theme with your site then a one way inbound link is alright.
Personally, I'd stay away from anything but hand-picked links done the old-fashioned way, and watch for the way the reciprocating site does the links, too.