Yeah, there's no point replacing something that already works well for you and, really, a contact form doesn't require something as advanced as GF.

What will be interesting to watch, however, is the way in which people innovate around GF's more advanced functionality, taking WordPress to new places. For those sorts of uses, the $31 or so (after 20% discount) is easily worth it. I think the key for GF's success will be in enabling that advanced functionality and opening up those possibilities. I'm looking forward to seeing what 1.2 will bring to the table.