IMHO yes, but I don't value graphics in general as important and greatly enjoyed other Custom Maid graphics games like Harem by Ker.
Bell Voice games capture a few themes I like very few NTR games do. First is NTR harem, a single antagonist taking multiple woman important to MC. Other NTR games with multiple heroines like heNTRia have a separate man for every heroine which makes it far less impactful in my view.
Second is betrayal, when the heroine after being stolen actively harms protagonist by aiding rival's goals, including helping him steal other girls.
Third is avoidable NTR by gameplay - NTR is about losing and you can't really lose if you never stood chances of winning. In most games "avoidable" NTR means having a dozen choices to opt out before every scene to appease NTR haters, but what I mean is NTR that can only be avoided by giving your very best when playing, and without reloading or replaying the game you should slip up at least some. In this regard those SRPG games aren't the greatest, since one defeat can cause a negative feedback loop as you become weaker and the enemy stronger. But again, very few games do it at all. Sexy Bar is one example of it done better, Gentle Girl 2 is another, gameplay wise.
That said, between no avaiable machine translations in engine, difficulty with hooking, and my general tiredness with MTL games especially hooked ones, I only played one of those fully and a few for a bit. And yes mediocre graphics don't help here, nor does difficult gameplay that makes it important to actually understand what the stats mean.