Read the warranty exclusions first. On this shelter they are the assembly instructions.

The 300 pound rule, and why it almost always applies here

Gazebo Penguin states that if the ground is not frozen when the shelter is installed, then in addition to the floor hooks and nails you must add weights of at least 300 pounds for every 11 by 16 foot area. Those weights are not included. This requirement was written for a climate where the ground freezes solid and grips a nail driven into it. Across most of the United States the ground never freezes completely, which means the ballast requirement is not an occasional cold-snap clause, it is the normal condition, and it is the single most commonly skipped step on this product. Work out the area of your shelter, do the arithmetic, and have the weight on site before you start.

Do not unfold a cold cover, because the windows can break

Their instruction is specific: the cover must be kept indoors if the outside temperature drops below 45F, or 7C, until the moment it is placed on the frame, and window breakage caused by ignoring this is not covered. The vinyl windows go brittle in the cold and crack along the fold lines when the cover is dragged out and opened. Since these shelters are bought precisely because cold weather is coming, this is a very easy mistake. Keep the cover in a heated space until the frame is standing and ready, then carry it out and fit it right away.

Guide wires are part of the anchoring, and their anchors are not in the box

The warranty language calls out guide wires directly: they must be installed as shown. The anchors for them are not included, because what holds in one soil does nothing in another. That leaves you sourcing anchors appropriate to your ground before installation day, not during it. Gazebo Penguin also point people to a local hardware store for the correct anchoring system for their particular surface. For asphalt or paving stones there is a permanent anchorage option, which paired with anti-wind stabilizer straps is what they recommend for high wind.

Seam leaks are not a defect, and condensation may not be covered

Two things worth knowing before you call. Water getting through the seams is expressly not treated as a manufacturing defect. And condensation is not covered where the shelter has not been installed on asphalt and the ground was not completely frozen at installation. Both of these are ordinary behavior for a fabric shelter over bare ground, so expect some moisture, park a wet car with that in mind, and do not count on a claim.

It has to sit on flat, level, solid ground

The structure must be anchored to a flat, leveled surface, and asphalt or concrete is what they name. Asphalt does double duty here, since it is also the surface that keeps you inside the condensation clause. A shelter pitched on soft or uneven ground racks the frame, and a racked frame does not tension the cover evenly, which is how covers wear through at the corners in a single season.

Missing or damaged parts do not go back to the store

Gazebo Penguin asks that you inspect the contents carefully on arrival and, if anything is missing or damaged, contact their Customer Experience department rather than returning the product to the place of purchase. Doing this before you start, rather than at the point where a part is missing from step nine with the frame half up and rain coming, is worth the twenty minutes.

Check whether your area treats it as a temporary structure

Gazebo Penguin advises consulting your local authority and municipal codes about installing temporary structures before purchase or assembly, because some jurisdictions require permits or otherwise regulate them. Seasonal car shelters are exactly the kind of structure some places restrict, particularly in front yards or where a homeowners association is involved. Ask first, since this shelter is highly visible from the street for several months a year.