I got a one month membership recently (having a 6 month some years ago) and I would say it´s not worth it. rFactor 2 is clearly better and feels better for me despite all the bugs in it´s code that make it quite a love/hate title. But the feel and racing with it when it works beats anything out there.
I also never liked the concept of having to pay for exactly everything and never owning anything and being penalized for others misstakes and just racing random dudes all the time if you don´t pay a league fee
It just costs way more then it tastes though particularly when it was released I did like the physics of it. But it´s behind titles like netkar Pro, FVA, rFactor 2 and maybe also Assetto Corsa by now I feel.