Contiki is a faboulous trip for anyone who doesn't want to worry about planning or is anxious about what to do on their travels!
It's a fun, friendly atmosphere, and you get to see a lot.
If you are one who likes to linger in places though, Contiki probably isn't the best option - even on an 'in depth explorer' trip, there were many locations we wished we had much more time in.
Only complaint was I needed to see a doctor on the trip, and I presumed Contiki would have doctors they worked with in the locations they visited, but instead I got sent to a local emergency room for some antibiotics!
Booked from Australia