Take-home whitening will suit you if you're happy to whiten gradually over a couple of weeks and like having your own trays so you can your whitening at home in the future.
In-chair whitening will suit you if you'd prefer to have your whitening completed in one appointment, don't want the commitment of wearing trays each day, or have an event coming up and are happy to do in chair whitening for maintenance.
White for Life will be perfect if you like the convenience of having your initial whitening completed in-chair, while also having custom trays for maintenance whitening.