Block Planes in review
Derek Cohen (in Perth, Australia)
I wrote a review of the Veritas block planes in 2008, which included the Lie Nielsen.
http://www.inthewoodshop.com/ToolReviews/VeritasPremiumBlockPlane.html

The bottom line is that one would be very happy with any of these planes. They all plane wood as well as each other. Where they differ is in their ergonomics. That is much of the content of the review.
Back then the steel choice was O1 or A2. PM-V11 did not come along until later.
Now PM-V11 is a better steel than the other two: it holds an edge longer, and (if you hollow grind or use a micro secondary bevel) it will hone as easily as O1. The PM steel is also fine grained like O1. What’s not to like?
Do not despair if you are not using PM-V11. All the other steels work just fine.
There is W1, a wonderful, buttery steel, which holds an edge less as long as O1 - just sharpen them a little more often. I used A2 for many years shooting endgrain, and it held up perfectly well with a 25 degree bevel. Now we also have the choice of sharpening with David’s Unicorn profile, and there is the promise of a durable edge.
I have three go-to block planes (I have a lot more than three - yes I know .. but the medication is not working!): a Veritas NX60 with PM-V11 sharpened at 25 degrees, a Veritas DX60 with A2 sharpened at 50 degrees as a small smoother, and a LN #103 (20 degree bed) with O1 sharpened at 25 degrees for chamfers.
Regards from Perth
Derek