Adults can achieve Truespel literacy in two weeks or less. In one study, grad students in linguistics learned the system in less than 10 minutes. Learning speed was enhanced by truespel's close approximation of the most frequent spellings found in the traditional writing system.
Most forms of regularized or phonemic English can be read without a key. The difficulty comes in learning to write. Truespel simplifies this part of the learning process with  a simple correspondence chart [above] and  a phonemic converter. After writing a sentence in Truespel, you can check its accuracy by pasting the original sentence in the converter's window. Up to 500 words can be converted at one time.
Since the truespel alphabet closely resembles Pitman's i.t.a., its success with children should be comparable. i.t.a. was extensively studied in the late 1960's. Children could learn i.t.a. over twice as fast as the traditional code. Since there is only 1/10th as much to learn, the advantage of a phonemic code should be much more. In countries with phonemic writing systems, children can learn 40 phonograms or 40 sound- symbol correspondences in 40 days.
One of the problems with the i.t.a was the lack of reading materials in this notation. Since truespel has an automatic on-line converter, this would not be a problem if truespel were used as the teaching alphabet. Anything available in the traditional notation can be instantly converted into truespel. There are already over 10,000 digital books available on line. Any of these can be readily converted to consistent truespel notation.
Most alphabetic writing systems provide a guide to pronunciation and spelling: The traditional English writing system doesn't. The advantages of phonemic notations such as truespel are  ease of learning and  ease of writing - if you can pronounce it you can spell it, and  ease of pronunciation.
a single distinct symbol, and
between each sound and its symbol
If we exclude new letters and diacritics as impractical, we are obliged either
At first glance, the Truespel alfubet looks more complex than the traditional one. This is because the traditional alphabet misrepresents the complexity of the English sound system. There are not just one or two [A] sounds but three or more depending on the number of combinations of the pure vowels that are included. With all the combinations there are as many as 35 vowel sounds in English. The Truespel alphabet includes 19 of them. The traditional alphabet stops at 5.
Linguists consider 20 vowels to be the minimum number needed to represent the sounds of American speech [21 for RP]. The Truespel alphabet does not isolate you [yue] and lists only the problematic R-combinations: The self evident combinations are left out: are [aar], ear [eer], our, and your [yuer]. [er] has to be listed because it is not a simple blend of the [e] and [r] sounds. The same is true for [air] and [or].
Since Truespel phonograms are based on familiar English spelling patterns, they can be read immediately without using a key. A major difference between the traditional writing system and Truespel is the consistent representation of five long vowels. The following table lists 20 vowels -22 counting stress variations. 17 are listed in the Truespel alphabet. With 17 phonograms and a stress marker, Truespel can represent 20 vowel sounds plus combinations with y and r.
and er can be stressed (hurt [hert]) or unstressed
as in other [uther] and sofa [soefu]
Most of the spellings will appear quite familiar, the difference is the absence of code overlap. If [ou] is to represent the the vowel in [out], it is also used for the vowel in all words that rhyme including 'brown brow' [broun brou] .
These representations of the vowels is not new. The basic system of English phonograms or sound signs was developed by Pitman and Ellis before 1900. There are dozens of reform notations based on them. New Spelling was promoted by the London based Simplified Spelling Society for 50 years. One version known as i. t. a. was extensively studied in British schools in the 1960's. A variant of New Spelling, called ALC fonetic or American Spelling is currently being promoted by the American Literacy Council in New York.
There are three key differences between Truespel and all other variants of New Spelling:
thu is spelled thu [not the], the plurals of dog and boy are [daugz & boiz]
While truespel grapheme-phoneme correspondence table is nearly identical to other brands of New Spelling, there is a significant difference on the printed page. The difference is due to the greater phonemic accuracy and consistency of Truespel.