From a branding point of view the bad thing is that when you say the name of the domain over the phone you always have to say bla-hyphen-bla.com which is a pain.
What if its one of those names that its rare to even find hyphen. take the chance?
Buying the domain is the least expensive thing you can do. Building a brand and investing in launching a site on the other hand can be one of the most expensive things you can do. An amazing site can do well in spite of a bad domain name (example: pinterest!) but a well known domain doesn't guarantee a great website or brand.
that's true. thanks!
Short answer, Yes.
A hyphen screams unprofessional to me. @michaelpinto has covered most of the rest.
Honestly, Yeah it is bad. I think it sounds a little unprofessional. Hope that helps
While I would lean against it, what happens if you don't have the hyphen? Just remember experts-exchange :)
Depends on the market. What market are you aiming for?