Wow, these are fun! They have a great range of difficulties. The most positive in the set feels almost as easy as a mini-jug to me. The most difficult is quite slopey and sets at what feels like V4-5 (maybe harder) on my 20 degree wall. Each hold has an easier side and a harder side, so you can really dial in the difficulty well. You will be able to make these as difficult as you want, but are also great for a newer climber like me (V3ish so far). The less abrasive texture gives some purchase, but you really have to rely on generating pressure to grip the hold… great for grip practice.
Lastly, the size of these holds is a huge selling point for home walls where real estate is limited. The rails are large enough to provide variety from standard jugs, crimps, and pinches… but are also the perfect size to not interfere with neighboring t-nuts. I have 72 t-nuts per panel, and these easily fit next to some of my largest holds.