Recent reviews by Paranoia

If you don't want to read: 9/10 Turn-based Strategy; challenging, not punishing; multiplayer somewhat lacking.

Longer version:
The few Cons:
Multiplayer is seriously sub-optimal for playing against strangers. Matches are hard to find, partially because there is no automatic search-function going that would find an opponent of the same strength for you, partially because one does not see if there are games to be had without staying on a screen that has that as the only function, and partially because when one creates a game one can't see if someone else makes a game you would be ready to accept.
If you want Multiplayer, get 1-3 friends to challenge.

Story Mode is short and minimal, and compensates by being absolutely brutal. However, normal missions are the bread and butter, story missions just the cheese&ham, so it is not all that much of a con. And Story Missions are not required at all, beyond for gaining few points to make life easier (see below).

The game has the strategy common sin of being very hard for new players. However, there are mechanics in place for making starting all over easier the more one has played, and recovery within a save is quite possible. After some time, the difficulty, story missions aside, averages to medium-hard-easy: your starting troops are unreliable, in the middle the enemy may surprise you with better stuff than they began with, and at the end your experienced troops should not get easily overwhelmed. Half a con, if I may.

Now for the good stuff:
The game is quite balanced and has immense tactical depth.
Micromanaging is possible and as deep as one wants it to be, but not required beyond the minimum awareness.
The artstyle is good, while obviously not quite the same quality as AAA games. Few of us play TBS for absurdly good graphics, however, and it is beyond good enough.
Single Player, despite being short on story, is varied and good enough for (looks at time played), at least 450+ hours. AI is a bit dump, however.
This point can't pressed hard enough: Despite being a game made with a skeleton crew, the Devs are active on the forums and actually answer to constructive feedback beyond any and all call of duty. Nothing feels like having actual personal dialog with the devs, possibly multiple times a week.
Bug reports are read and acted upon. Feedback is routinely checked. We get information about what is going to happen and often why.

So as said: 9/10, bought this and both DLC:s, bought to two friends as presents and have 2 more copies to spare.

PS. Do, by the way, buy the DLC:s. Cheapish, good, not gamebreaking, and makes the very start somewhat easier.