Question about Assembla

I received an email from someone at assembla.com inviting me to take part in
a paid trial period for a job. I looked up the site and it appears to be
one of groupings of developers. I am always careful about unsolicited "job
offers", as I am a firm believer in the "no such thing as a free lunch"
maxim.

So, my question is, does anyone have any experience with this company and,
if so, was it good or bad?

(He got my name and address from this news group)

--
Shelly