Allan Holdsworth technique is challenging
for all musicians, and that is probably why it is so popular. His music has been criticised for being hard to listen to. That is because he only claims to be a jazz musician and it is true that, as a composer his material leaves alot to be desired. It's definitely not sexy music but it is highly experimental and musical prowess reigns rather than communication of emotion.
If you were able to master that type of material, you could benefit harmonically and technically then
move to a different style and come back to Allan's technique
when you were more musically experienced.
All in all, this style of material is another feather in the cap for a pro contemporary guitarist, as Holdsworth has taken his place among the greats in axeman history.