I personally would avoid CommentLuv. Off the top of my head, the cons would be:
- Costs $97
- Increases/promotes comment spam
- Increases WordPress database size by adding more data to the comments table
- Increases page load times due to extra processing of each comment
The only pros would be that it increases your exposure slightly and you will most likely get an increase in comments - but if the commenters are self-serving and coming simply to drop a link (as opposed to actually being interested in what you have to read) then is that really a good thing?
On top of all that, I personally think that CommentLuv is just kind of....cheesy....and doesn't belong on a professional website.

