I had never heard of Englishtown before now, but a search on Google for reviews provided some helpful information.
I didn't want to look at the Englishtown website's own testimonials, because obviously they would all be glowing.
The site does have a number of grade A's given, like on this website, and is included in a couple websites' choice of Top ten, like this website.
However, I also saw a number of complaints, like here and here.
The most comprehensive and informative review I could find was on this ESL blog.
I hope this helps you with your decision.
(not a teacher, just a language lover)
Interested in Language