Plextor are a good brand and data speeds are near-equal to full sized SSD's from the likes of the Samsung Evo range, around 500/420 read/write mb/s. I already have one in an XPS and have bought this for wife's laptop to compliment her existing 1TB spinner.
Also, if you're on Flubit you'll get an even better price. I did two Flubit's for both the 128 and 256gb models and both came back with 11% discount, so the 256gb was only £82.80 which is a no-brainer and thus purchased there instead.
Hope it helps. 5 of the 128GB and 3 of the 256GB at time of writing.
Merry Christmas all.