I received my Hill Topper Lithium bike conversion kit around the same time as you and I agree not only was I please with the whole purchasing process but also just how fast the kit was delivered. I had it up and going in no time (just as advertised) and the light weight of the lithium battery (6 lbs.) did not negativity impact the overall weight of my bike that much. Weight increase is important to me since I have to carry my bike up several sets of steps to get it inside and out of the house so total bike weight was very important to me. I live in West Virginia and we have a lot of hills and bridges and I was concern if the 24 volt motor would have enough power to make it up these hills with any speed. To my surprise, not only is this little motor quite powerful, combined with the lithium battery, it seems to not only to the job but still have enough reserved power left to keep me running along ( I weigh 170 lbs. and am 57 years old) at 15 to 17 mph. Since I pedal assistant during our ride, I get well over a 20 mile range with one charge. In short, I love my bike even more now!
Aaron


