Web, Pronunciation scored, Expensive, ★
(Their low cost Audio CDs are reviewed elsewhere)
Berlitz offers online courses for 1 to 3 people at a time: "interactive instructor-led live learning via the Internet." "Instructors are native-fluent speakers ... available for more than 50 languages." So they are not always native speakers, just a similar fluency in the opinion of Berlitz managers. No samples of these are available.
The unknown cost and lack of online samples prevent me from recommending these.