Is this set really safe for live electrical work?

The drivers are rated for 1000V and insulated up to the handle. That rating covers the tool, but safe practice still depends on the work and your protective gear.

What sizes are included?

The six-piece kit covers common slotted and Phillips sizes used in panels, outlets and switches. Check the listed sizes against the fasteners you work with most.

How does Wiha compare with Klein or Wera insulated drivers?

All three are trade-grade. Wiha is known for tight tip fit and durable insulation; Klein is easier to find in US stores, and Wera offers more handle shapes.

Do the drivers come in a case?

Some versions ship in a roll or case and others do not. Confirm what the package includes before buying if storage matters to you.

Are these good for a homeowner, or only for electricians?

They work for homeowners doing outlet and switch work, but the six sizes may be more than a casual DIYer needs. Electricians get the most use from them.