I've tried to make Slee work for a week or so now, and I'm ready to pronounce judgement.
I guess the TL:DR is that she is just as cumbersome as she appears to be.
Let's look at the base case. You spend a click to install her, and, later, you spend 2 creds to rez her. Once she is loaded you spend clicks to deal 5 meat damage until you win. Sounds great.
The unwieldiness comes from how loading her works.
So, since she is an asset, she is taking up a whole remote server. She doesn't have a paid ability self trash Jackson Howard or Executive Boot Camp kind of thing, so you are open to Temüjin Contract and Bank Job style shenanigans if you put her in an open server.
Leaving aside for a moment the question of where she goes, let's consider how her loading goes:
First off, Slee is in the wrong faction. Weyland doesn't run Pup or Resistor , where the corp gets to fire the events and the runner just mitigates them with their text. Weyland's core is typically a barrier with one "end the run" sub. So if you want Slee to work at all you have to swap out your ice a bit.
A reasonable compromise between gimmick ice that exists just to load ( Ireress and its ilk), and the typical weyland walls is our endless supply of multi sub walls. Curtain Wall Spiderweb . Good stuff. If the runner hits one of these without a breaker, you rez the barrier and slee, and you are halfway loaded.
And then the runner moneys up, and runs over and trashes Slee. Womp womp.
So forget that. Let's load her in 1 encounter. Hive Tour Guide . Loving this. They run into this noise...and blam, bounced. Slee is loaded.
And then the runner runs over and trashes Slee! Womp womp.
Maybe it was last click? But Snare! is a card. People who end turns tagged vs. Weyland tend to learn better quickly. It is a rare run vs. Weyland that goes off last click.
The only way that this really works is if the faceplant was INTO THE SLEE SERVER. She was behind the Tour Guide. The runner ran her, presuming a Project Atlas or other never advance, and you bounced them and loaded her in one click. Good on ya.
Just pointing out that we are already a bit in the weeds here. There are 4 other assets to get the Tour Guide up to this level? You haven't scored any points to get your Hive out of range?
But anyway. The runner bounces off the Slee server. She rezzes and loads up. Aw yeah, death is coming!
And they draw up to 5 cards (or put down a plascrete). Womp womp.
That's right. Even if Slee is fully loaded. Even if she doesn't get trashed. They can just survive it.
So maybe consider Slee outside of Weyland? There are factions where trashing is harder (IG), there are factions where you let the subs fire more (red, yellow). But she is 3 influence! So she is the whole game plan. And a lot of those decks are horizontal, so the whole "subs going unbroken" concept is kind of iffy.
She's just a mess. Like, Slee is fundamentally a member of the species of Weyland Assets that pretend the game lets you have multiple mostly safe remotes. The Root or Mumbad Construction Co. are better versions of the idea of things that you might put into the scoring remote or a peer to it. She's somewhere between those and The Board (which is, admittedly, worse than Slee).
She'd be decent, but not great, with a higher trash cost. As it is, Slee is a gimmick card, begging for a deck to be built around her, and delivering to anyone who falls for it a deck that wins less often than the old SEA/Scorch setup.