Are these shoes actually waterproof?

The upper is described as waterproof, which suits rain and wet pavement. Waterproof materials breathe less than mesh, so expect warmer feet in hot weather.

Do they work for plantar fasciitis or flat feet?

They are built around an orthopedic insole with arch support, which many people with mild arch issues find helpful. For diagnosed conditions, check with a podiatrist, since the support is in the insole rather than a rigid sole.

How do they fit compared with normal walking shoes?

The lace-up design lets you adjust across the instep, and the padded collar holds the heel. There is no published size guidance, so compare against a shoe you already own.

Can I wear them for real hiking?

They suit easy trails, gravel paths and wet city walks. For steep or rocky terrain, a stiffer hiking boot with a deeper lug outsole is the safer choice.

One pair of shoes with the orthopedic insole fitted. No spare laces or inserts are mentioned.

Are they worth it over branded orthotic shoes?

They offer the same cushioned, supportive idea as Orthofeet or Skechers orthotic lines. The trade-off is that a known brand gives you tested sizing and a track record these shoes do not yet have.