I recently bought a similar 5MHz DDS, one of those in a toy like plastic case, you know.
It's working well, but the main problem is the absolutely P.O.S crappy potmeters they have soldered onto these things. What a shame. Why couldn't they spend an extra dollar or two on a decent pot, fer friggs sakes...
Be prepared to yank them out, you'll probably need to do that sooner or later. I see Bourns are making similar potmeters that may fit without problems.