I just used the cape on a 3 day trip on the Benton MacKaye Trail where it rained on us for 24+ hours straight. I just used a polycro groundsheet and pitched it close to the ground. I used my pack, water bottles and other gear I didn't mind getting splashed to build a wall of the front end where the vestibule is higher. Rain wouldn't get in, but it would splash up when it hit water already on the ground. I stayed dry and slept comfortable. I am six feet tall and definitely on the upper end of the height range as there wasn't a ton of room between my feet/head and the shelter walls, but it ended up being enough. If you use a thick pad, like a NeoAir that would also work against you there as I use a 0.66" Ridgerest. It is easy to set up and seems well designed, though line locks on the tie outs would be a nice touch.
If you like the Golite SL1, I agree with Steven that the Gossamer Gear SpinnShelter is a great choice. I have one of those as well and it is my go to three season shelter. It is a little more fiddly to get a taut pitch with, and doesn't have as much sitting up headroom, but is more roomy otherwise.
If you want to try one of them you are welcome to borrow either of them.