onlooker tried to suggest increasing the feedback cap to a level where the parasitic capacitance of the circuitry becomes insignificant.
The circuit with two comparators and an RS flip-flop is not complex. It is just a proper way how to make amplitude stable (supply independent) triangle wave, without much distortion and with very good symmetry. Only the frequencly remains supply dependent, but that is also easily solvable by slightly modifying the circuit. The schematic is from a device where the exact and precise frequency wasn't a requirement, but stable amplitude certainly was.
The circuit from Hero999 has also a disadvantage of producing assymetrical waveshape. The ratio of the rising : falling slope duration here is given by R2, R9 (partialy by the positive feedback network of R8, R7).
//Of course my description of the problems with these circuits isn't exhaustive, there some more dependencies of some component values, and so. But you can get some rough idea, how do they work.