It's not pleasant that the forum can show up only after a few comments, so I have to post replies in order to see it in the most recent posts list.
Reviews about tactics' programs of chessok

Combinations for Club Players is a relatively easy program, but still nevertheless great for drills. I'd personally go with CT-ART 5 (comes with CT-ART 4 as well as Mating Nets and CT-ART Beginner), Total Chess Training IV, Advanced Defense, and Total Chess Endings.

Yes, I see that CT-ART 5 includes other levels as well.
I can take a look at the other programs you are proposing.Thank you.

OogieBoogie, I took a careful and thorough look at the other programs .
Total chess training 4 contains about 50000 exercises. I don't know how many of them one can solve in a lifetime! 33000 of them is the course Attack on the King. I think it is easy to lose control with so many thousands of exercises. This package (TCT4) is maybe for a child who has chess-related ambitions and many years available to reach high levels. But for an amateur adult who just wants some tactical improvement the time is not enough to study all this material! The latter may find convenient CT-Art 5.0 with about 7000 exercises. And if one decides to purchase CT-Art then a Total training package looks very reasonless and time consuming. The Advanced Defense and Total Chess Endings courses combined with CT-Art 5 are a full training package with 400+3150+7000 exercises. This is the opinion I have formed by carefully reading the contents of all their programs.
There are many titles “Chess Tactics for Club and Intermediate Players”, “CT-ART 5″,”CT-ART 2″, “CT-ART 3″, “chess tactics(level 1,2,3)”, “CT-ART Mating Combinations”, “Chess Combination Encyclopedia”, “Combinations for Club players”. The variety is confusing. Do you know anything about their programs for tactics?