Genuinely quite a good game - the reviews here don't make much sense to me. The burn-ins don't break flow any more than any other respawn in any other game - and in fact are faster. Landing on people is also a lot of fun.
People often complain at the lack of servers - but actually the only problem is that full servers don't show. You don't see many full servers because they are filtered out. However, i never have any trouble finding a fairly full server to play on, and the bots which make up the numbers are surprisingly competent.
The weapons feel well balanced and the kit customisation options are great fun to play around with. They also allow you to change tactics to a greater extent than other games. I particularly like the "overdrive" running mechanic, which allows you to damage players by ramming them - although only with some practice, as running head-on will do no damage at all.
The single player is just window dressing, but this is a very solid game i would totally recommend.