I have a T2510 w/w I LOVE IT. Last season I was pruning at a house for about 7 hours. My helper and I were around the truck all day and somehow my brand new 4 day old Redmax BCz3001 walked away fron my trimmer rack with pins and all. I was so F%^$^# Pi$$ed that i went down to my local shop and saw the C4 Shindaiwa hanging on the wall.. I figued it is a Shindaiwa how bad could it be. THIS MACHINE RIPS!!!! I will say it is a definate window breaker.....takes a little longer than the reg 2-strokes to warm up, and I find myself using the choke to start it more often.. but it is def.. the most powerfull machine I have owned. (I have 2 t231, and a few redmax 2501s). Oh yea and the new Shindaiwa ezspool head is GREAT!!!