Right now, it's Les Mills On Demand cardio: Body Combat
, Body Step
, Body Attack
, etc. SO. MUCH. FUN. with fantastic music that is synched to the moves. Really enjoying the Body Combat workouts with Dan & Rach, whom are awesome!!! Shout out for Jackie O. in Body Step/Attack, too, though, as she just gets better with age.
They also include spinning classes, Sh'Bam (dancier hip/hop moves) and Grit which is hardcore cardio hard on the joints. Hahaha, well, mine anyway.
(I've also been enjoying Body Pump classes too but you asked about the cardio). It is $14.99/month and they do have a 10 day free trial....(and have really added quite a lot of content since I did the trial in 2016). My month has been filled with lots of FUN, LOL.