I had these boots out today for about eight hours of ice climbing, which involved steep approach, a couple of multi pitch lines, easy ice, steep ice, wet ice...and everything in between.
They are really, really, nice.
I was concerned about the bulk of the boots, but once I started climbing, they felt perfect. Precise, solid, supportive. In my size (48) and weight (90 kg), lighter boots like my Phantom Techs often just don't feel supportive. These boots are "truck" as the cool kids used to say a few years back.
And they are warm. It's the first time in years I had no issues with cold feet, and I didn't adjust the boots once. I just tied the laces moderately and closed the strap with some light pressure before the first pitch, and that was it for the rest of the day. I would say that they were warmer that my Phantom Techs with electric socks!
I followed the advice above and removed the lace locks. I will definitely search for some thicker non-slip laces.
Another intriguing possibility is to buy another set of inner boots; you could change socks and inner boots before climbing if you jad a particularly hard (and thus sweaty) approach, or you could have two pairs of liners to rotate for multi-day climbs.
Anyway, they were expensive, but for me having supportive boots and warm toes makes ice climbing so much more enjoyable. I think boots like this are a great place to spend money and grams :)