I enjoyed the solid British style of this production and although I can see why Christopher Plummer's military bearing might not be matched in this version, it isn't a fair comparison to me.
I found the sets and the singing, albeit not so polished as on film, far more immediately engaging and the 'live' feel came across really well.
A great treat, found by chance on the itv hub from its broadcast in the final days of last year (2017) - a Sunday night jewel.