No comment on that particular service, but I just checked Murglar 2 on my phone and it half-works, not everything is available to play / download but I'm not locked out either
Edit: I updated the app and it is much better, everything I tried downloads
Since murglar allows you to download and keep the music you are paying for, I'm pretty sure that's completely illegal and could get you banned from the service
Which you'd then stop paying for
And turn to regular old piracy to get your music
...maybe someone at deezer, a service that isn't even profitable, think that one a bit further, because I'm on murglar since forever (tho I don't use it all the time, only when I need it)