Bought that drive to upgrade my 13" Apple Mac Book Pro 2010. I had no problems to install the drive (actually it was far easier than expected) and it works just fine. No additional noise, vibrations,...
The drive is fast. I mad some tests with XBench 1.3: my old hard-drive scored around 18 points; the Seagate hard-drive gets 35 points. This test may not be fair as the old drive was almost full.
Here are the X-Bench results for the Seagate Momentus ST9750420AS:
Results 35.42
System Info
Xbench Version 1.3
System Version 10.6.7 (10J869)
Physical RAM 8192 MB
Model MacBookPro7,1
Drive Type ST9750420AS
Disk Test 35.42
Sequential 128.76
Uncached Write 159.26 97.78 MB/sec [4K blocks]
Uncached Write 154.32 87.31 MB/sec [256K blocks]
Uncached Read 78.28 22.91 MB/sec [4K blocks]
Uncached Read 180.81 90.87 MB/sec [256K blocks]
Random 20.54
Uncached Write 5.99 0.63 MB/sec [4K blocks]
Uncached Write 115.83 37.08 MB/sec [256K blocks]
Uncached Read 82.03 0.58 MB/sec [4K blocks]
Uncached Read 141.90 26.33 MB/sec [256K blocks]
Go and get X-Bench to test your drive and to decide if it would be worth to get a Seagate Momentus.