The Pro 700 does its job, it is efficient and pleasant in the mouth, although vibrations puzzle me. However, I am not a fan of his baby blue a bit dull .. but each his own.
Its only flaw is its price: nearly 60.
Knowing that the Pro 650 and Pro 600's respectively 50 and 35, and that also they eliminate 100% of dental plaque and more (compared to a manual brush), I do not see what justifies the investment.
In conclusion: Excellent product, but no significant difference compared with the model Pro 600, unjustified investment.
Erwann on Amazon.com