I used the Hoopla last year and the short answer is I like it.
The long answer is that it has some advantages and drawbacks when compared to the GoLite SL3.
Advantages Over SL3
1) I'm 6'2" and it provided a little more room to lay down without touching. Still happens though.
2) Definitely more head room than SL3.
3) Designed to use one trekking pole. I had a custom carbon fiber pole made that I can add pieces to. I use the same pole on my Hoopla, SL3 and SL5.
4) Comes with light weight cord locks and guy lines
5) Built in measurements to get proper pitch.
Disadvantages
1) Cost unless you can pro-form etc... Not as big a deal since GoLite has raised their prices
2) Have to invert fabric to insert hoop. It is kind of a pain but not too bad.
3) No adjusters on stake loops. This makes it harder to pitch and adjust the height for ventilation.
4) Only one vent and the vent is more horizontal so in driving rain you could get water in.
The first time I used the Hoopla in the field we arrived at our campsite after dark and in a moderate rain. Having to turn the Hoopla inside out to insert the hoop in the top of the shelter is a mental drawback to this shelter. If you pitch a SL3 on wet ground the inside will get wet from laying on the ground while being pitched. So either way the inside will get wet. This is the same for a SL5, or BCS too. I would assume that a Megatarp or Supertarp would be the same also. The biggest disadvantage to me of the Hoopla over the SL3 is the lack of adjusters on the stake loops. The adjusters on the SL makes pitching and adjusting for ventilation super easy. I think I will add some small cord and tie a sheet bend to the stake loops to make the pitch on the Hoopla adjustable.
Overall I really like the Hoopla and think it is a solid option to consider for someone looking to go floorless.
Here are some pictures from a hunt last year where we had a SL3, Hoopla, and Hilleberg Akto in camp.
SL3, Hoopla and Akto
SL3 and Hoopla
Hoopla
