I have it and I like it a lot. $25 per month is a fair amount but I've been waiting for Foxtel to undercut themselves for AGES. If it had Premier League it would be 9/10, but I'd say it's 8/10.
I also recall that Kayo has no connect / disconnect penalties, so you can conceivably d/c your account over summer and not pay when the NRL is no longer on.
For myself, my internet is mostly ok with occasional patchiness and Kayo responds well - mostly 1080p with occasional drops to 720p/480p, but it almost never stops to buffer, and the lower rate only holds for 5 to 10 seconds before jumping back to 1080p.
I mostly watch it on my 4K TV via nvidia SHIELD device, which is an Android TV device - Kayo has an Android TV app which is great. Same app exists for Android phones. I also watch on my computer via web browser as backup if the TV is being used - same quality.
I particularly like how Kayo guesses which live sport you might like, based on your existing profile / choices (you can set up any code or team in your preferences). So whenever I open up during footy, it always offers me first the current NRL match, then there's a menu bar lower down with the other top live sports. You can then pick up the match either live or from the start.
Kayo also do a "Kayo Mini" highlights package for every match, which amounts to about 15-18 minutes of key highlights. These are great - a good opening summary of the match and the sides, then the key flow of matches including always the last ~30 seconds of each half regardless of events. The mini highlights are uploaded really quickly, sometimes within 1-2 hours of the match finishing, which is great - WAY faster than the NRL's own extended highlights.
Sometimes it's a little difficult to find individual highlights packages amongst all the NRL content they offer - it seems to favour full match highlights and then the other Foxtel shows like The Fan (which is great BTW) and Matt Johns. Quick fix is to select "NRL" then specifically select a team, to view their specific match videos.
Only downside I've had so far is that Kayo includes a "major events" tracker in the match, which appears on the time bar when you pause a live feed and shows events that have happened so far. This is theoretically good because you can skip back along the time bar to tries or half-time. But the other day the major events tracking got de-synced from my video feed, such that it was showing me tries on the time-bar that hadn't happened yet. You could avoid this by not pausing or skipping through the game, but the point of watching games on delay is being able to skip through the breaks in the game. It has only happened once, but it sort of ruined the experience because I could see that 1 or 2 tries were coming up - we were playing Roosters and I could guess that a high-scoring affair probably didn't favour Tigers.
I would also like a setting where I could force Kayo to never offer me AFL highlights, because such a thing doesn't really exist.
Sports package is $30 on Fox isn't it? Either way I give it a 9/10 because it has the A-League and La Liga.
You can't just get the Sports package on its own though you need to get a Basic package.