I just threw these doors on my jk a few days ago, and I love em. However, they do come with some headaches.
Installation - Really not too difficult, should take about a half hour. I can go into details, but this link says it all, use the dudes tips ---> Bestop Soft Doors Installed
Door handle/latch - Definitely takes more effort to open and close the door, sometimes it usually is a two handed job if you have the uppers on the door as well. It takes some getting use to, but something that can be dealt with. My girlfriend is pretty weak, and she doenst mind messing with them. Dont forget if your locking both sides, you will be doing a lot of walking around the vehicle!
Fitment - One of the problems that comes with the soft door; they dont fit perfectly but they work. They do not seal completely at the bottom of the base ( which to me is no big deal) and the top of the window ( which seems to be a complaint of many). You can do what the above poster said, and use bungee cords to attach the top of the window to a point in the vehicle. I used some velcro straps, check this post out for a good look and description on the process of em ---> Soft door flap fix
Noise/Flapping - They are soft doors, they are going to flap and make noise. You can wrap some pipe insulation around the tubes on the inside of the door which cuts down on the flapping of the cloth onto the tubes ( i used sticky velcro since I had it handy) but the actual wind noise really wont go away when your doing highway speeds. Again, its a soft door...
Leakage - I cant comment on this since I hvae not had them on during a rain storm, but I think they will be okay. I just monstalined my interior not long ago, so I really do not care about the interior or getting wet. My biggest concern would be the girlfriend complaining about it... But, I think if your driving in rain you would be fine.
Mirrors - Since I will be running my factory steel doors in the colder seasons, I did not want to move my factory mirrors from the door. I also wanted mirrors mounted on the body so that I did not have to mess around with mirrors everytime I would take the doors on/off. You can go for the lange mirrors that Sueby mentioned, but those will cost you since that price is for 1 mirror I believe. I am using rugged ridge quick release mirror kit. With these mirrors, you have full visibility on both sides with or without the soft doors on ( dont know about the steel doors but i will have factory mirrors on with those doors anyway) and best of all these mirrors do not vibrate. You also do not have to worry about messing and stripping those torx bolts everytime you remove or mount them because the bracket can stay on the entire time your running hard/soft/no doors since you can use the knob to remove the mirrors. I did my research, and these seem to be the best option for the money.
Overall- I am happy with them. They are definitely pricey, and for some it is hard to grasp that you need to buy bungee cords to make these work when your paying 500 bucks for two of them. They could fit a little better on their own, but it is what it is. I got them to have a half door option, and to make going door less A LOT easier. It is nice to throw these in the back of the car and put doors on in less than 4 minutes. And hey, these are cloth doors. They are supposed to flap, make noise, and not seal well. I wouldnt want to run all year round with these, but from march to october I will be using them. Let me know if you want any more info!