Two Additional Costume Slots - $5.00
Rating 
This is another option that affects all of your characters, which is pretty nice. I have to assume it affects future characters that you create as well, but one never knows.
By level 40, you can earn up to four costume slots. For most people, this is more than enough. But some people might really want to give their character a lot of appearance options. For them, this might be a worthwhile C-Store option.
Collectible Action Figures - $1.00 each
Rating
Collectible action figures in Champions Online are basically non-combat pets. Most of them have enlarged heads that are like bobble-head dolls. They have no function nor do they have special emotes or other actions. They just follow you around. You can find or earn a lot of them in game via perks, missions, or a couple of in-game shops.
I must admit that I rarely ever see them in use. $1.00 is pretty cheap, and perhaps Cryptic has no interest in selling anything for less than $1.00. But considering what you are getting, it is impossible to rate this higher than average.
If they gave these pets some fun emotes or something, then perhaps they would be more fun and more worthwhile. Most of them look really, really bad too. That certainly does not help.
Final Conclusions and Overall Rating
Rating 
The general idea to have a microtransaction cash shop along with an up front, full price box ($50) and a monthly subscription ($15 per month) was a pretty terrible plan right out of the gate. Sadly, the implementation in Champions Online is even worse. Smart customers are going to look at other games in the industry and see that everyone else is making a choice: subscriptions (WoW, LOTRO, Eve), or free to play with microtransactions (Runes of Magic, Primordiax) - not both.
One has to wonder what Cryptic and Bill Roper think Champions Online is offering that justifies a higher cost than games with more content, more features, more players, and a better community.
It is difficult not to see parallels to Bill Roper's last game, Hellgate: London. Roper was founder and CEO of Flagship, the now defunct company that created HG:L. Despite the fact that the game was a classic Diablo-style action RPG, Roper felt his game warranted not just a $50 box price, but a monthly subscription. Interestingly, he also fought and argued against respecs for that game. In less than a year, the company was out of business and the game had utterly failed.
For the sake of the MMO industry and gamers who enjoy Champions Online, one can only hope that Roper does not lead Champions Online down that same dark path. But the impression created by the C-Store certainly makes it look like runaway greed is dominating over smart business and game design.