My girlfriend and I spent 3 days there earlier this year. As others mentioned, it is definitely dull but we actually loved it for a short trip. There are lots of museums and walking around is very easy (minus the insane amount of construction happening). What we really liked about Kuwait versus other gulf countries is 1) the country has a pretty interesting history and 2) the people are super friendly and welcoming. Unlike other countries in the area, people there we met couldn't believe we had traveled just to visit and were extremely open and welcoming; something I haven't necessarily found in the other countries (considering you won't even meet any Emiratis in the UAE, for example).