Malletech is the Marimba and Mallet maker which was established by Leigh Howered Stevens. Apart from LHS, such famous players like Gordon Stout and Evelyn Glennie uses Malletec Instruments.
On the other hand, since keyboard are made one set a time for each instrument, there are opinions that the balance of the sound from one bar to the next is not optimal etc.
The instrument is thought to suite both classical repatoir as well as the modern repatoir.