This could very well be the best park in the whole Greater KL area. Toilets are decent, though it can get dirty during the busy hours/days and I have never seen any cleaners around, so go before coming especially you ladies :) I don't advise entering the hiking trails here unless you are very fit and have the proper shoes and gear. Bring along a good pair of noise cancelling headphones, as the mosque is right next to the park, and there can be a lot of noisy kids sometimes. The paths used to be mostly in slightly softer tarmac, but as usual, all the morons in charge of this in Malaysia seem to be changing them to concrete and other hard materials. These are really bad on the knees(knee-guards recommended), so you have no choice but to get shoes and insoles with the maximum amount of cushioning and protection - even then, I wouldn't jog on these hard surfaces.

The lighting/wiring also doesn't seem to have been maintained well, and many sections have no lights once it gets darker in the evening, or early in the morning, so bring along some small led torch lights, along with some anti-mosquito ointment and always wear long track pants at these times. I like how all the entrances are closed when it is still dark in the morning or as it gets darker in the evening, except for the one next to the small car park, and the security guy stands there observing more closely at these times. I have also seen a security guy on motorcycle circling the park during the evening when it got darker.

Some section of the park have suffered weather damage and you should also supervise your kids at all times and keep your eyes open and not day dream as you move about. Slight renovation and refurbishing work was going on the last time I was here. I have seen some activities going on in the early morning while it was still a bit dark, Thai Chi and maybe line dancing among others, you could probably join them if interested. I heard cars may have been towed away or fined when parked outside of the free small parking zone, in no parking zones with yellow lines, especially during weekdays, so car pooling here on those days is highly recommended.

On a related note, once you have finished your walk in the early morning, you can find good coffee and tea at a nearby Kopitiam corner shop in Taman Tun, where you will usually bump into walkers from the park yet again. I'll add a review for that shop soon. Their food is overall pretty good as well - always a lot of regulars.