My kit was from the 90s, I didn't like how the plain plastic looked so I spray painted it white. My modeling ability isn't very good, but it seemed to hold together ok. The worst problem I had putting it together was getting the upper and lower saucer pieces to fit. I don't remember any particular problems with the warp engines, but if they were a little off, I probably wouldn't have noticed.
I had a TMP Enterprise that had lights that need 'C' batteries.