Reviews on www.mtbroutes.be were indicating that these trails are among the best ones in the area, and similar to my favourite Herentals trails.
Naturally, with that grading, I had to go and see for myself!
Green trail is dominated by wide dirt trail with loose sand. There was one short cobble section, and some car-traffic tarmac riding when crossing the highway (twice). Another tarmac section, low-traffic in paralel with the busy highway, was too long for my liking: I went into autopilot mode and I almost missed a 45-degree turn to the left. I most definitely could not blame the signage: It was excellent on the green trail.

The first real singletrack bit came somewhere at the end, and then, suddenly, a short technical Herentals-like bit. I was shocked out of autopilot mode. Why the sudden change of trail quality?
Around the corner I was met by signs for the red trail.
What a difference! There were quite many long boring sections on the red trail. Nevertheless, I came off the loop panting: I blazed the boring sections away as fast as I could, and on the remaining winding and bumpy singletrack sections I tried to keep ahead of or up with other trail users.
Indeed, on the red trail there are similarities with the Herentals trails. The difference is though, that in Lille-Beerse it is like you have wide dirt road and you pop into the forest for some nice bits. In Herentals it is the opposite: Over there, it is ONE long NICE bit, with the occasional wide dirt road. Over there, you get lost in its maze of winding singletrack .. (dreaming away ..)
Signage on red trail was less excellent than on the green one, but still sufficient. Signs tended to be inside the bends so that I had to lower my speed. Me dislike.
Last section before the split over to the blue was pretty awesome! It struck me, though, that they seem to have cut down several trees. To make the trail easier? How sad!
Blue trail contributed an abomination of a long tarmac section along a busy road. Back in the forest, I was sad to pass several interesting-looking paths. For me, blue loop had only one interesting section, and that was at the end: Just next to the tarmac roundabout that I had arrived on by car. Not very technical, but winding and bumpy, and quite enjoyable.
Signage on blue trail was sufficient, although ambiguous in a couple of places.
Lille-Beerse, thank you, but no thank you. I will come back here only if I have time to trail explore away your boring bits.
If I just want to ride, and ride your best bits, then I go to nearby Herentals instead. Over there, I have your best bits many times over, one after the other, in a maze of trails.
Coming up next: Trails in Luxemburg!