More interesting than impressive. The context of "Art for Art's sake" in the middle of the Victorian era, and the characters involved are well explained and illustrated. Glad we went. You can see the impact of William Morris, in Liberty prints today.
Here's a good review (from when it was at the V&A).
The vistas from the LOH are remarkable. Check out the new Vista point
and Lands End Lookout
while you're there