Does the 72-inch Icon come with the countertop and sinks?

Yes. This is the 72-inch double-sink configuration with a countertop included, so it is a complete vanity top setup rather than a cabinet alone.

What are the drawers and glides like?

Drawers use full-extension soft-close glides. On the larger models the drawers are dovetail-constructed, which is sturdier than stapled or nailed drawer boxes.

What can the built-in outlets and USB ports charge?

They are standard 110V outlets plus USB charging ports, enough for hair tools, electric toothbrushes, shavers and phones. They need the vanity wired to a nearby power source.

Is solid hardwood better than MDF for a bathroom vanity?

Solid hardwood and cabinet-grade materials resist moisture better and hold up longer than painted MDF or particleboard, which can swell if water gets into seams. The trade-off is weight and cost.

How many sinks does the 72-inch model have?

Two. The 72-inch Icon is a double-sink vanity, so two people can use it at once.

Will it fit a standard bathroom alcove?

A 72-inch vanity needs a wall run of at least 72 inches plus clearance at the sides. Measure the alcove and door swing before ordering, and plan for help moving it into place.