Hi mate, I would definitely recommend this setup from personal experience. I know there are mixed reviews on this forum about Sage/Breville but so far both machines have ran flawlessly even with the grinder being second hand. Coffee machine is quick to heat up due to it's thermocoil rather than a proper boiler which I find useful and you only have to wait a few seconds after finishing steaming before you can pull a shot which again, is useful.
There are a couple of 'bad' points I suppose but to me they are minimal and are more of a slight hindrance than a reason to not buy the machine:
- Steam arm is slow in comparison to other machines which means it takes a while to steam your milk. However, when learning like I assume you will be, this will help as the process will be nice and steady allowing you to gauge the milk and adjust your steaming process etc. The only time I find it annoyingly slow is when I am steaming a big jug at once for multiple drinks. However, this is not what the machine is ideally designed to do so I can't call it a major flaw.
- The water tank is small. The normal water use along with the water used for the purging of the machine means the water tank can only hold maybe 5/6 drinks worth of water at a time max. It takes no time to fill but it's just remembering to fill it as there is no warning light etc. The machine will just run itself dry which is obviously not good for the components inside. Luckily, I haven't ran it dry but I can see how it will be easy to forget especially when making multiple drinks at once. This brings me on to the last point:
- The drip tray is tiny. You will be emptying the drip tray way before refilling the tank. The 'drip tray full' float only pops up when the drip tray is basically overflowing so just remember to empty the drip tray after every 2-3 drinks and you won't have water all over the counter (as I have had multiple times!!).
In terms of the grinder, I have had no problems and find it easy to adjust. The screen also helps a lot when setting up. I find that I have a base setting which gives a relatively good shot and I can then adjust this depending on the bean.
All in all, you can't go wrong especially when starting up as they aren't too expensive when buying new. There are always DTP's and SGP's popping up on the 'For Sale' section on this forum which would have been a lot better looked after than if you were to buy from eBay etc.
Hope this clears a few things up for you