It's a fine program with many limitations, but may not be useful for everyone, here's an extended review for the potential costumer and hopefully feedback for the devs.
ComiPo by it's own grounds is very limited, you can't edit the character's height, proportions, width, etc. so you'll never see old people looking old, nor a younger character looking younger from the rest, so you've got all cookie cutter models, you can't even adjust parameters such as eye size and such (I wanted to adjust the chin and cheek width so badly but I can't).
There's not many customization options, there's some very limited set of accsesories and hair styles, so the combinations end up very limited, you can't customize the colors of items or clothing either (altough there's some very nice filters for the final images), so far it seems like there's no in-game option to change the character's skin colours.
The DLCs barely add anything to the mix, I bought a bundle, I think it contained 2 or 3 DLCs and when I used the program it felt as if I didn't had any DLCs, as they are pretty missleading telling you they offer a two digit amount of clothing each, but in the end it's just 1-2 clothes palette swapped, if they allowed you to recolor the clothing it would be very helpful and add many possibilities, but as it is, the DLC is good to have but not a must buy.
Now, with all this said, you may be wondering why I recommend this program.
To me it's helpful, I like to draw to relax, I use CSP, but the dummies included (on CSP) are extremely hard to pose (altough more versatile), but it consumes A LOT of time to get the desired pose and angle to me at least, so I prefer to use this, make a vanilla character, pose it as I need, convert to png and use as reference on CSP, on the downside, even when there are a lot of poses here, camera angles and such (which btw is very fast compared to CSP's), they arn't very flexible, you can rotate the head and such, but (may be a newb mistake here, so I apologize if I'm mistaken, I'll make sure to edit if I find out later on) it seems like you can't rotate hands or other body parts.
With that said, I think the devs can have a very nice and versatile program if they work on it, specially the customization options, Steam workshop for this would be awesome to allow people to upload their models and such.
To the costumer: if you want a quirky program to have a giggle and such, this may be for you, if you need some quick reference dummies like me, this works as well, but if you're looking for something serious to do comics and such, you may not find what you're looking in here (mainly the customization, it's so limited, otherwise the filters are awesome).
To the devs: I think the hardest part is done (the core software), just add more customization options (body proportions and clothing), more interactions betwen models, more hair, and accesories and such and you'll have a solid program backed by a clean and intuitive interface, just stop with the DLCs please as they barely add anything, they're quite expensive and may be overwhelming to the new users, unless you plan to add more to the current DLCs so they're more worthy of buying and owning, as it is, it's just not worth it.
Also some glitches need to be fixed, it's kind of silly that firefox and ComiPo can't co-exist without comipo crashing.
I hope this review helps potential costumers with their purchase and the devs on improving the experience so we can get a better product.