This is one of the minor examples of Bollywood's ability to cross genres. For better ones, turn to "Humraaz" or, well, probably anything you can find on the market. Why is "Yeh Kaisi Mohabbat" this bad? It starts and ends with Johnny Lever. I cannot stand this guy. Period. I don't know if there's some special humor in his jokes that you only get if you're Indian, but I don't think so. It's not only his jokes, it's his whole appearance. This terrible eye-rolling, his constant shouting - I've seen about 20 films with him in it and I got annoyed by him in every single one of them. And here, his role is rather big. Go figure.
To be fair, it's not just him. I had a problem with the plot and the three newcomers as well. First the actors: Krishna, Deeksha and Viveka were all rather bland. Viveka is at least a stunning beauty but her role was small. Deeksha has an amazing body but I got distracted by her face. It looks elegant, but her eyes are so far away from each other, it just doesn't look, well, real. But who am I to judge an actor by the looks, so I continue elsewhere ... the plot.
The comedy start has some nice gags, but overall, it's boring. The thriller part, which kicks in about half way through, is predictable and unsuspensful. There are one or two good scenes, the rest is a waste of time. I guess the producers smelled these weaknesses and tried to up the ante with some special effects. The major ones were the wire fighting. You know, when the actor hangs on wires and seems to fly while fighting - à la "Matrix", "Crouching Tiger" etc. You also remember the wires in "Scary Movie" or "Austin Powers 3"? This is how it looks here. It really looks like a parody of wire fighting.
At the end, we even have the "Matrix"-bullet-effect. Yes, they were that desperate. Overall, I'd say you can invest 162 minutes way better than in this. Not even the music is particularly good. I'd rate it
2/10