My cats really, really love this item. It gets a lot of use and they claw at the sisal bridge, they sleep on it like a hammock, they use it as a walkway. It's very popular.
I would, however, recommend some improvements as there are a few minor things I think could be made better. Firstly, the bridge fabric slides over the poles, with sleeves on the underside to house the wooden pole. However, through normal use you often find it starts to slide off. So we have to keep pushing it back on. A slightly rubberised coating on the inside lip of the sleeve would prevent this and make it a lot less slippy, as we've got ours quite high and it's not accessible from the ground, so it's annoying needing to get a stool in order to reach it to slide the bridge fabric back on. We've got it properly spaced so it's quite taut, but it still risks slipping off occasionally.
I'd also prefer if it had 3 or 4 rather than 2 mounting points, as just a single wall fixing at the top and bottom is probably fine, but I'd get more reassurance (given it's a heavily popular item on our wall) if it were more firmly anchored into the wall with more fixings.
All told, we're delighted with it, but we're likely to use rubber bands or double-sided tape to stop the bridge material from slipping off the poles and this could be improved at a product level.
