Hi, Mike
As the old saying goes, don't knock it 'til you try it.
I'm not suggesting the PICaxe will ever replace other systems, but I do maintain it is the easiest and cheapest way to get one's feet wet in this field.
And the greatest value is the ease with which one can later move into more advance areas. If a person has already learned PWM, ADC, I^C, LCD etc. on the PICaxe, then stepping up to more powerful and faster systems is much easier, I feel. At least, that's the way it has been for me. I definately feel my prior experience with PICaxe has made my transision into assembly and boostc, and the larger PICs, much easier. In other words, I already spoke the language.
Check out R H Anderson's web site, and even order out an 18X. You might be surprised.
Regards