Rating: 4 / 5
I've used this off and on for several years, in combination with both the Integral Designs Bug Liner and a bivy sack (most often the ID Salathe.) I've found it to be a versatile, simple shelter.
It's light (about a pound, including stakes.) There are no guy lines to tangle, assuming a ground-level pitch using hiking poles inside; the tangle has always been a real turn-off about tarps for me. It pitches easily: stake out the floor in a rectangle, insert your hiking pole in the front, then add supplemental stakes and a second hiking pole inside toward the rear as desired. You can leave the front completely open, partially open, or closed. The overlapping closure, as opposed to a zipper, has never been any significant problem for me. This may be because I use a bivy rather than a groundsheet. I can see a potential for leakage to occur at the peak of the overlap, which could be an issue with a groundsheet; I've never had any problem with leakage, though.
I've found it a very roomy one person shelter, easy to enter and exit. The vestibule area has been adequate to hold wet gear, and it's nice to have some room beside the bivy for sorting gear or putting my boots on. Headroom is adequate. I question how comfortable it would be with two persons, however.
Although it can also be pitched different ways, like a regular tarp, I've never found it necessary; the basic design has always met my needs.
I've not been impressed with the Bug Liner that is designed for the Silshelter. It essentially creates a double-walled tent, at about the same weight and price. However, it doesn't function well in this mode; you're better off with something like a Seedhouse SL1 if you want that kind of shelter.
I've since moved on (some might say back) to an MSR Hubba, which I find more convenient and comfortable. But, for a single wall, floorless tent, the SilShelter can't be beat. Combined with a bivy, the shelter offers great versatility: I can use the bivy alone, to sleep under the stars; I can use the Silshelter alone for a quick lunchtime shelter in the rain; or I can use both for really great storm protection. (Of course, I can do all of this with my Hubba more simply.)