Are these compatile with my camera?

[UrFavSigma]

Sigma EF 610 DG Super Flash for Nikon 189306 and the Sigma EF 610 DG Super Flash for Nikon 199306

I have the Nikon D3000 and was wondering if they are compatible with it?
And are they pretty good flashes?

 

[UrFavSigma]

Anyone know about these flashes?

 

[KmH]

Any flash having a standard ISO 518:2006 hot shoe foot and a trigger voltage of less than +250V (no negative voltage), will be compatable with your D3000 to one degree or another.

This is in fact covered in your D3000 users manual. Nikon recommends only using Nikon flash units. Using non-Nikon lenses, flashes, batteries, or other non-Nikon parts pretty much voids your Nikon warranty if you have3 any warranty time remaining.

You don't mention if you need to use Nikon's iTTL capability or not.