I tried to order a bamboo grip to day but the minimum order was 4 grips(because it was a back order item). 4 is too many for me so I'll just wait until they are in stock so I can just order what I need.
I got my first and perhaps my last order of bamboo grips yesterday. While the appearance and texture of each was great, there were deep splits and cracks both between the grain of the rings and between the rings in 3 or 4 I received. With 3 of 4 with visible fatal flaws, I was afraid to use the 4th so I returned all them.
If the quality of the sample I observed is representative of quality of the product overall, its not ready for use on rods by serious rod builders.