I really didn't get on with cross cells for most of it, but the last 5-10 puzzles are great and totally brought back the dizzying highs of Hexcells.

Overall, it's bizarrely missing a lot of quality of life features that would make this a nicer experience (some of which are in his other games) and it's not as good as Hexcells... But if you liked Hexcells, you'd enjoy the end of this!