This episode was okay? But I didn't get why Oliver felt the need to make that little speech at the end to Felicity. Putting aside my shipper goggles, I could see Felicity being upset over Oliver sleeping with Isabel because she's part of their circle - it's not likely Felicity would care if Oliver hooked up with someone Felicity didn't have to work with on a daily basis. I was more annoyed at Isabel's insinuations about Oliver/Felicity - I get where she's coming from, but the way she just marginalized Felicity to Oliver's hook up was really discouraging.

Oh, Felicity, you deserve better than Oliver.

Well it's likely she's going to, soon ;) And then I'm all there for Oliver not being prepared for Felicity having a boyfriend.