I dropped a couple hundred into this game when I realized just how much I was playing it. 2 sets of 100 USD so 300 Crystals total, separated over two months because I really wanted the stamp cards when they came out, each time I waited for an event that had a black unit that I really wanted, and after rolling all 300 crystals I got 0 blacks. I was bummed, I got a few decent gold units... not even really a good platinum that I can remember... at least not one that I use on my team currently. This event popped up, I wasn't all that interested in Aisha (a rear guard - pfft). Then I saw how strong she was with her ability up. The problem was this time I didn't have a hundred bucks to drop, all I had left on my account was 10 SC.
I rolled twice, got Camilla (yes somehow with 300 SC and a bunch of premium summons before I'd never snagged her) so I was pretty happy, and with my second roll I got Aisha. I was completely blown away and convinced someone upstairs was playing a horrible prank on me. I thought for sure I was going to die in my sleep that night. I ended up using 7 of my 9 rainbow's on her to get her skill to 5/5. Shes currently 50CC45 and shes a god damned monster. She's basically a vampire hunter without her skill - and a superior Solano with it up. Additionally due to Aisha's passive, 20% cooldown reduction (30% after awakening) Solano has more than a 70% skill up time (I think her CD is 13-14 seconds). It's... well for lack of a better term: It's retarded.
Especially in this event, she costs like 6 to deploy - and her attack power is +50%... when I pop her ability she's brushing up around 2k attack power, and completely destroying anything around her.
Man I really want skill awakening... That full map nuke looks incredible.
TL;DR
Paid money - got nothing.
Used free SC - Rolled Twice, got good Healer (Camilla) and Aisha. No longer mind having thrown 200 dollars into the game previously.