Even when mine has had some rough running issues (really bad a few weeks ago 02 sensors) it never failed to start or take me where i wanted to go, round trips of upto 130 miles. The full tank goes a bit like this

if you hammer it, but i dont know how else to drive it

. Absolutely bulletproof, askdean has done a few excellent write ups lately. Get the belts done, if there is no evidence of this in the history, may as well do the waterpump @ the same time.