We have the Silver Cross Coast and use it as a double. I've been eyeing this for awhile and finally decided to purchase now that my older son is 4. It it fantastic! It rides really smooth. It's small enough to be easy for me to walk around but larger enough that I'm not worried he'll fall off. Installation and removal are super easy.
This is worlds better than the aftermarket ride-along we used to have (think clunky, bumpy, always in the way, tools required to add/remove). This was worth every penny, and I only wish I bought it sooner.

Great accessory for my 3 year old who doesn't want to sit very long in the tandem seat. It's also very easy to take on and off. My only complaint is that you need to stand a little to the side while pushing the stroller or else your feel will keep hitting the board.

My dtr loves riding on the board. Easy to install. Bit annoying to push with it on but its def better than no board!

Although I bought my stroller in 2018, it apparently was the 2017 model so it didn’t have a slot for the stroller board. Before buying ensure you have the 2018 and beyond model.