It's certainly more satisfactory than 'Murphy', Beckett's earlier novel, in my opinion. But it is rather a book of two halves, focusing on two separate protagonists, Molloy, and then, Moran. Both sections are typical Beckett, soaked in vigorous, agile language twisting round a meaning just out of sight. However exasperating at times, Beckett's rigorous and unstinting examinations of mundane thoughts, habits and ideas are always refreshing. There's a strange, unique brand of purity and acuity about his prose.
That said, I did much prefer the Molloy section. I found Molloy a more interesting, more complex character. And he was funnier too. Moran is stiff and unyielding and somehow constrained. Neither are particularly pleasant but with Moran there's a humourless superciliousness that just grated with me. There are a number of echoes between the two stories and one reading might argue that Moran is a younger Molloy, the facts being that slippery. I don't think it's important one way or the other, though it is fun to imagine the metamorphosis.