When comparing Carpalx QGMLWY vs qwpr, the Slant community recommends qwpr for most people. In the question“What are the best keyboard layouts for programming?” qwpr is ranked 13th while Carpalx QGMLWY is ranked 15th. The most important reason people chose qwpr is:
Qwpr is pretty close to QWERTY, and even the HJKL keys are in the same left-to-right order (though on different rows). Alternatively, the AltGr plane also has arrow keys in a sensible position under the right hand.
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Pros
Pro Easier to learn than QGMLWB
Keeps the ZXCV key in the same place as the very common QWERTY keyboard layout. More familiar than even than QGMLWB.
Pro The layout is basically good for most Latin languages
As vowels and consonants are mostly divided between 2 hands and most words in Latin languages are made of 2-letter (consonant+vowel) syllables, the layout keeps it efficiency not only in English, for which it was primarily created, but in other languages too.
Pro It takes much less effort to type than classical layout
The layout effectively combines not only changing hands methods, and rolling fingers as well, that makes typing a real pleasure.
Pro About the same score on the carplax test as the QGMLWB variant
See the source here.
Pro Good for vim users
Qwpr is pretty close to QWERTY, and even the HJKL keys are in the same left-to-right order (though on different rows). Alternatively, the AltGr plane also has arrow keys in a sensible position under the right hand.
Pro Common shortcuts don't move
A, Z, X, C, and V are in the same positions as QWERTY and Colemak.
Pro As easy as Dvorak
It's 32% easier than QWERTY by the Carpalx metric, which is slightly better than Dvorak's 30%. This is probably within Carpalx's margin of error though.
Pro Alternate plane with CapsLock key
CapsLock is pretty useless for most people, but qwpr layout uses it to shift to another plane with easy access to punctuation and arrow keys. This is especially useful for programmers.
Pro Minimal retraining from QWERTY
11 keys move, but except for P and E, they don't change fingers.
Cons
Con Very unpopular
Even rich on keyboard layouts variety Linux distros like Deepin, offering most of existing layouts, doesn't have this one. The situation on Android is not better, moreover if somebody get used to Swift-like keyboards, that do not have this layout, that person will be forced to have a second (e.g. qwerty) layout in mind.
Con Not always worth trying
The layout is great only if somebody uses it daily and a lot, like journalists, bloggers, writers do. In this case inconvenience to install the layout is worth use it. If you primarily use your phone/tablet to write some comments in Internet and other tiny writing tasks having such an unpopular layout on just your PC/laptop could be not justified.
Con Puts E on the pinky
'E' is the most used English letter by far, at almost 13%. That's almost as much as the spacebar. It needs to be on a strong finger. The pinky is the weakest finger and on the right side it is already overtaxed from Ctrl, Shift, and Enter.
Con P and E change fingers from QWERTY
Which makes it harder than necessary to learn from QWERTY. (And makes no sense. 'E' was arguably better in its QWERTY position on a strong finger.) This is due to using the flawed Carpalx effort model.