Very useful set of classes and a good place to take advantage of code templates in LS for the getters.
Even though the sessions I give are on XPages, I still do a lot of LotusScript. An added benefit of this approach is that the same kind of wrapper can be used for Java in XPages in a managed bean, for example. If you're already familiar with the LotusScript it makes the transition easier. It also makes support across XPages and LotusScript more standardised. Many Domino apps will still be at core LotusScript and traditional Notes Client for some time yet.