Yeah, it seems very lame. It essentially freezes itself every time it taps for mana. But it's interesting that it doesn't come in tapped, so the first turn you get a dual land without any drawbacks. It just slows you down every turn after the first turn.

As Velkaarn mentioned, Power Conduit seems like a very nice combo. Free charge or +1/+1 tokens, and you get a dual land with no drawbacks! Of course when you have the land without Power Conduit, it sucks big time.