Everyone has an opinion, of course...The LT-40 kit is a mix of laser and other type parts. But with typical Sig instructions, anyone at all handy, with a little help, can turn out a credible model. Haven't seen the Tele instructions, so can't judge, but I bet theyare pretty decent. . Here's where my opinion may be a little different from the crowd. The Tele- or the Kadet Senior, are 3 channel models, the LT-40 is more an aileron trainer. I prefer the RET planes as primary trainers, followed by something like the LT-40 as the first aileron trainer.
But the LT-40 might be some easier for an inexperienced builder to complete and fly. So, I figure these are aall useable choices. Which to use depends on the situation and the abilities of the beginner..