Tobira is really good to practice reading comprehension, grammar and vocabulary. I found the content to be simple at first but then gradually more complex, something really good in my opinion, better than diving head on into more native stuff and looking every other word in the dictionary.
I think the Kanzen Master is really good, but more JLPT oriented. It comes in separate books so it’s a more expensive option.
Both are really good, but I feel the Kanzen series is loosely tied, as it covers point by point all the required JLPT content, whereas Tobira has a more “holistic” approach and you will get every area like reading, listening, grammar, together in one chapter.