The glued and screwed Alan is the most successful bike of any manufacturer, ever, in terms of competative results. Most of the major CX titles since the late 1960s/early 1970s* have been won on an Alan.
Its a sound method of construction, but probably not as good as welded Al.
Alan are thoroughbred CX bikes, so probably lack threaded eyelets for waterbottles, rack and fenders. Personally I think there are better CX style frames to use for commuters.

* whenever araldite was invented !!