HSM, I use Grovias on my 5 month old, and have found them them fantastic for absorbancy, ease of use and fit. We never get daytime leaks, though we have been at night until my nappy supplier suggested adding an extra cover (it's a Flip cover, I think made by BumGenius) at night, which has solved the problem.

We have, however, just had a sudden onset problem of deterioration, which I am about to ask for advice regarding it in a separate thread. My nappy lady is hopeful that Grovia will come to the party with replacements, though.