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I have that one too, and it is excellent. Once you remove the anti-kickback device.
I have built so many shelves and cabinets with it.You can buy Makita track fairly cheaply, which is completely compatible - even has the tilt groove. The only problem is sometimes it's not straight, but thankfully Screwfix has a great returns/exchange policy.
I've seen 2.4m Festool track cheap sometimes, and it's also compatible, but doesn't have the groove for locking in a tilted saw.
If you want to keep costs down, I got this one from screwfix on the back of good reviews from Peter Millard
(who apparently knows his stuff).
The one he reviews there is branded titan, and a different colour, but is the same saw.
I've only used it a little bit, but it's been good to me so far.
Though as @Soul says a good upgrade would be a 2.4m track. I do notice when going from one half of the track to the other. Fine for most things though.