Having built many of Milicast's resin kits, I can recommend them wholeheartedly. While it is true that some of their very early kits suffered from warpage and broken parts, this is certainly not the case nowadays. The range is immense, casting very good, and level of detail excellent. As far as price is concerned, they are splendid value for money.
As an aside, if you were considering World War I subjects, your best source without a doubt, is another UK company, WD Models (wdmodels.com).