My choice was between binning it and getting coil, or re tuning (as it’s only marginal on top of the service).
Very definitely worth it. A coil (or CCDBa) may be better again, but it’s very good and cost half what even a cheep coil would have. The air can was about £35 and the spacers another tenner I think. The service, tune and postage was £105 (including replacing the bits that had broken, if it’s fine then it’d be cheeper).
If it’s working fine at the moment I’d maybe swap the air can and play about with spacers if you want to as that’s what made the greatest difference on mine, it effectively lowered the spring rate further in the travel which meant it didn’t try and buck me off on big jumps which it did with the rebound set right for normal stuff. The tune was just the icing on the cake. This may/may not be a problem for lighter riders using less pressure?