If a very realistic piano sample is extremely important to you (and also realistic e-pianos), then the Krome is definitely worth considering. However, in other sections, e.g. strings and brass, I was partly disappointed of it.
I tested the Krome in detail last year in a store and uploaded some detailed line-in recordings, e.g. this audio of the Krome string sounds:
http://youtu.be/HeBxV6HuOzo
The impressive sounding 3.8 GB of samples the Krome has are 90%dedicated to the pianos, so the rest is not spectacular.
I found that the M3XP (module) was more recommendable, especially its included brass/woodwinds expansion sounds. The M3XP expansion piano sounds nearly the same as the Krome although it only has 128MB of waveROM (the sound as such is absolutely the same; the smaller sample size of the M3XP piano is only noticeable if you play chromatic scales slowly and pay attention to 'jumps' in the timbre, or if you listen closely to the decay of a single tone.)
You should also test if you are happy with the keybed; some users complain that the black keys cannot be pressed down easily enough in certain positions, I didn't feel it was a big issue when I tested it.