Does the X-Mid 1 Solid come with poles?

No. It is a trekking pole shelter, so you pitch it with two adjustable trekking poles set to the recommended height. Durston sells optional dedicated poles if you do not hike with trekking poles.

How does it differ from the regular X-Mid 1?

The Solid uses a solid inner fabric instead of mesh. That blocks drafts and spindrift for cold-weather use, but it vents less and feels warmer in humid conditions.

Is it a freestanding tent?

No. It is a trekking pole tent that must be staked out. It pitches best on ground where you can drive stakes, and is harder to set up on rock or platforms.

How much does it weigh?

Durston lists the packed weight at 31 oz (890 g). That is light for a double-wall one-person tent, though stakes and trekking poles add to your carried weight.

Can two people sleep in it?

It is a one-person tent. Two adults would be very cramped, though there is room for a sleeping pad plus gear alongside you.

Is it good for warm summer trips?

It works, but the solid inner and limited ventilation make it warmer and more condensation-prone than a mesh tent. For hot, humid trips a mesh inner is the better choice.