So far, not real good. I got a Stan’s kit, it’s the widest “rim strip” kit they sell, for 25-28mm width (external) rims, while mine are 29mm internal width.
First bad sign, the tape is 12mm wide, barely wider than my spoke holes. I put in a double width double layer. Ok. Put in the rim strips and couldn’t get the bead seated (no Presta compressor). Tried CO2, no go. Took to a bike shop. Held air at 35psi for 10 days. One gravel ride, one road ride (everything is swamped here). This morning, flat. Pumped it back up, flat again in a couple of hours. Soapy water says leaking around valve. Spun it around some more, wiggled valve, tightened nut. So far holding air again.
I haven’t ridden on trail at low pressure yet, but could tell no difference on gravel and road. I wasn’t having many flat problems, but did it preemptively. Now I think I’m going to be paranoid about losing air through leaky tape or valve. Grrr.