Unsatisfied with my HP 35s, I just bought an HP 33s for use at work, and to my surprise, I like it much better than the 35s!
These are some of the advantages I see in everyday use:
- When I type a long number, the 33s inserts commas every three digits, so that I can easily see the magnitude of what I have entered (e.g., try to enter 120 millions). Not so on the 35s.
- The ALL mode on the 35s is badly broken, as often the exponent is not fully visible (!!). Not so on the 33s.
- The STO key in the 33s is unshifted; on the 35s, it is shifted.
- The displays are more or less equivalent to me.
- The 35s looks better than the 33s, but the 33s is thinner and ligher, an advantage when you have to carry it around.
- The ENTER key on the 33s is not bad after all; it is placed close to the arithmetic operation keys, and I use all such keys equivalently often.
- The 33s is free from many small annoying things in the 35s, such as the inability of entering 1/3 as 1..3 (.1.3 enters 0 1/3, which is visually more confusing).
- The 33s comes with a real manual.
Luca