Home Gym (one of our bedrooms)
Los Gatos, CA
We purchased the 4x4ft tiles to minimize the number of seams and are very happy with the product. The one gotcha to keep in mind is getting your order right..
We struggled with both the online calculator (which doesn't really take into account the shape of our room and further, presents one option that doesn't completely cover the room), AND working with one of their representatives. In the end we ended up short a few pieces and some of our pieces were incorrect (needed fewer edge/corner pieces and more center pieces). So my advice is look very specifically at what pieces you're getting and what type of pieces and do your own analysis on whether it's correct.
In the end, rubber flooring was great and helped us correct the pieces we needed and the product itself is great. It is also pretty easy to install.. I used a box cutter to cut the tiles which really wasn't as hard as some of the other reviewers made it out to be. Just make sure you have new blades and keep slicing it until you cut through.