Signature Fitness SF-S2 Sprint Demon - Motorless Curved Sprint Treadmill with Adjustable Levels of Resistance - Drastically Increases Intensity of Running and Walking, Black

If you want a curved treadmill and don’t need all the bells and whistles then this is the one.It’s light so you can move it around in your space with ease.It’s sturdy. I’m 250lbs so that was one of my concerns before I purchased it. No wobble or motion at all.You cannot run barefoot. It tells you that in the instructions. I run in the barefoot minimalist shoes with no problem at all. The machine is very smooth and doesn’t make a lot of noise. Once you learn how to walk or run with the right degree of forward lean then there is no problem with smoothness. You can also adjust the tension to help with this as well.So far I am very happy with this treadmill.

Easy to move around on carpet sliders. Relatively easy to setup with manual. Adjusting the belt was required. Great price at 700$. Provides a great workout for power walking and running. I use fat grips on the handle bars for extra comfort. Able to workout with a neutral spine (was a requirement for me). Can sprint and then do burpees for circuits. Im 6’2 and 175, the tread width is laughable but not really an issue at all, plus smaller treads means easy to move into home through doorways. I was looking at sole f80 and didnt want the maintenance or power related issues. This type of treadmill is more inline with what I needed and good enough at 700. I think 999 is too much for standard price though. If i was to change anything, I would want everything to fold down. They arms get in the way if you try to move it by tilting and using wheels, i just dont do that and use carpet sliders instead.

The treadmill is great and sturdy I'm 208lbs, I find it more challenging than running on ground but that's cause I have bad form on ground. The treadmill is in km not sure it can be changed but it's of no importance to me. The cable for the resistance lever hangs low enough to rub on the belt, but two zip ties will take care of that. Awesome treadmill for the price. I bought it July and I have been using it since with zero issues.Had to edit out March not sure why it was there,Update: June 2024 treadmill still in great condition​.

Over all, I think this is a nice machine, but probably for people in the lighter side of things.I weight 220 lbs, and the slates were bending while running, enough to make me lose momentum. This only happened while I would take a step right in the middle of the slats.The belt sits on top of what it seem plastic bearings/wheels, similar to those a skate.The belt running width is 16in(picture) which had me a little worried, since it was not noted in the description, but you have enough space to run/walk.The base is very sturdy but the arms move a good amount when running and it seems like the resistance cable rattles a bit also.I did enjoy the highest resistance while walk and to simulate pushing a sled. also walking backyards to simulate pulling a sled. The resistant levels are not very much different once you go down from the highest resistance. Again not sure if this is related to my weight.So I did end up returning my machine, which was a pretty smooth process. UPS came by my house and picked it up. I was able to put it back in the original package without any issues.Assembly was easy, I was able to do it by myself, but it is always helpful to have an extra hand.Again, over all a decent machine specially for the price, I would just recommend it for people that probably weight 200lbs or less.As for me I am hoping I can try the next up, I think the Grit Runner seems pretty good level up from this one.

The belt is peeling from robbing the machine? I just got it and already returning it. Can’t on it at all? Waste of time. Never again

This treadmill is great for sprint training, very easy to assemble as well.

Great machine. Well built and sturdy. There's a scratch on one of the bars but I'm not sure if this is from shipping or assembling at home. Walking and running feels like going uphill due to the slight incline. Running feels natural because you're driving the speed of the treadmill. The movement of the slats causes static electricity on the handle bars and can shock you. Overall this was a great purchase. Highly recommended.

For the value this is awesome. It is sturdy and well constructed. Others are way more expensive and just a beast of a piece of equipment, for what though? This isn’t as wide or as long as those more expensive ones, but I’m 5’11” 165lbs so I don’t need the extra inches (nor do I feel the slightest bit cramped on this). It’s light and maneuverable too, an added bonus.When first unpackaging and setting it up pay attention to how the belt is lining up. I had to make some adjustments to make sure it ran freely.I would give it five stars if the interface/screen/module wasn’t so frail, cheap, and too simplistic. I have a Concept2 rower and that screen is simple, yet sturdy and provides so much more functionality. Hopefully the makers see this review and change that device out in the future.Buy it now. Stop wondering.