This game is broken.
In normal scrabble, triple word score is a one-time windfall. In scrabble express, it ends the game.
What happens is this:
1. You make the game-losing blunder of going anywhere near triple word score.
2. I manage to play on the TWS square.
3. You play off my word.
4. Before I play again, my word from step 2 is removed from the board, re-exposing the triple word score square. It's guaranteed I have a chance to hit TWS again because you had to leave one of my original word's letters on the board.
5. If I can play on that letter, go back to step 2.
This loop means that I triple score EVERY SINGLE TURN, while you never do. And there is nothing you can do to stop it. You can stall it for a turn by playing into the letter on the TWS so it doesn't open, but that won't escape the repeated abuse of TWS, only delay it.
There is only one reasonable way out of this loop: I get an unlucky roll and cannot make any word at all that plays on TWS square. But even when that happens, you don't get your chance because now the word is not in line with TWS.
I noticed this pattern going on with a double word score square the first time I played, and ever since then this sort of repeating lock has become the dominant feature of the game.
My girlfriend will probably never play me again because the last time we played I won 200 to 75 by playing over and over and over and over on the triple word score after she made the mistake of playing a letter on the edge row. (What a gentleman!)
Now that we've seen how critical it is, I'm sure she'll never play to the edge row again, but you START the game on a double word score square, so probably the correct strategy in this game is for whoever wins the initial die roll to camp that star square (which is a double) for the entire game.
I give this game three stars because it seems to have potential for fun, but the dominance of this looped abuse of the premium square is so central to the game and so one-sided and boring when it happens, that it's not very fun.
It may be an interesting strategy game about evading these loop-traps, but that's a bit more brutal than the light, friendly lunchtime word game I was shopping for.