Sherry-
I have 2 "2"'s; one in a tank in my bedroom, one in my frag tank.
I really like the mounting system; it's the best of the "Stream" style powerheads out there.
They look cool. Neat, modern, aerodynamic design.
Cons:
They're big. Almost as big as my Tunze's. With a lot less flow (But cheaper).
They're unproven. I got two from Dr's Foster & Smith, their second batch in. They seem well built, but who knows how long they'll last.
Truthfully, I'd save my pennies for a Stream. They're OK for "Back-Office" kinda work, but I'm a little partial to Tunze. It's not only flow, it's reliability, rebuildability, customer service, and operational cost. If you add all that up, they're tough to beat....
I can take pics if you'd like of one, give you a size comparison... I'll be back in town on Friday night, if you'd like.
-Andy/Oldimpala