had a first run spartan, I upgraded the cooling quite a bit, but ran it stock otherwise with great results.. I made a new stuffing tube and used better teflon lining, and added a boca thrust washer, ran on 5s and it was about matched to my buddies nitro hydros.. I used two 5s packs in parallel and got similar runtimes to their boats, but it ran pretty wet.

6s woulda made it ballistic..

I was happy with it and would recommend it, but I would also say that you should look at the Aquacraft UL1 hydro.. stupid fast and pretty inexpensive.. you can get it for 299 at OSE, and they have the upgrade cooling jacket there as well..

Boats are a blast.. I have a mini thunder, a miss vegas deuce, and I just ordered all the stuff to put together a gas hydro.. funding that was the only reason I let go of the spartan.