They have stayed pretty true to it, they bought it about a year ago and made it free. It used to be like Tower or Cornerstone where you had to buy it for $29 bucks or something. Have liked it since then and was a much better client than MacHg at the time for teams. Glad Windows is getting this, I use TortoiseHg and Git there currently but will probably switch.
IMHO Bitbucket/Atlassian is doing it the right way: Native on the client side.