Shipwreck
I have been using NTV via the NTV addon(mikey1234) onto Rapsberry pis and a number of Android boxes for almost 2 years now. Whilst the subscription is cheap, on occasion we do get streaming loss, pixelation and frame jumping, so not perfect but great for the price.
I have found since using either the stalker add on (MK) or the livetv version of IPTV Stalker on pi's that the streams are so much better than via the Kodi add on.