Pros: you get to see bits of the destination that you'd probably not normally see and some are actually interesting; you'll find your way around easier as you've stared and stared at a map before you went and now you've actually run bits of the place; and (for me) I recognised that people are basically nice.
Cons: you get to see bits of the destination that you'd probably not normally want to see (a significant amount of the Tallinn race was along a motorway); you'll need to wash your kit in a sink in the hotel (I just got into the shower wearing mine); you can't eat and drink before the race like you'd normally eat and drink on holiday; and your partner is going to have to entertain themselves on the day and put up with your moaning about your muscles aching the next day.
I like my Newtons. I bought my first pair in an attempt to move from heel striking to midfoot. And, for me, they worked. As an added bonus, for the same perceived amount of effort I normally run faster than in my Asics (same size). Perhaps that's the shoe style, perhaps it's the shoe weight, or perhaps it's just because I expect that to be the case and my body does what it expects.
Just go for the standard Sir Isaac if you're happy with your pronation, or the Sir Isaac S if you're not.
One bit of advice: the blurb that comes with the shoes says something like "only run a mile in them the first time and build up from there". I know it sounds stupid, but follow the advice. I didn't on my first run. Only ran 3 miles, but my muscles were aching.
When I run home, I use an Inov-8 25l, but leave the office shoes in the office. When I need to carry a small rain jacket in it then the clothes just fit. Without the rain jacket, there's plenty of space for empty lunch boxes, or things like that.
As for laptops: As cougie says, memory stick fits easily.
Hitler plugged blogs? Blimey. I'd always thought he was a bit of a nut job who became leader of Germany, did some stuff that we all think is crazy, and killed a lot of innocent people, but he plugged blogs too? That's really, really is bad.