Your IPA is fine. /ʒ/ is indeed a marginal phoneme in English, and it does exist; I'd suggest to use words like "Zhukov" to illustrate it (since the phoneme does exist, native speakers have no problems with the word and it is unambiguous, unlike e.g. garage). What is a problem is that in English, affricates are not phonemically different from stop+sibilant clusters. It is better to use a different language to illustrate the point.

Also, word-final -s can be difficult for some speakers - e.g. Italians more likely than not append a schwa in such words (in English loanwords etc)

@JuhaMetsäkallas it is actually a semivowel :-) Phonetically [ɪ̯], but phonemically is it probably better analysed as /j/ (and could be written using a separate letter, following the tradition of ŭ, but that would be likely too much)

@LyubomirVasilev Ĉi tia (aŭ simila) frazo ekzistas en multaj lingvoj, ekz. en la bulgara „Как е леко и лесно изчислено пи всички знаят щом желаят”...

@OliverMason It might be a localized issue - since a glotal stop is not phonemic in Esperanto, you are free to insert it, but I do not think I've heard it in these positions (it would certainly be discouraged in some/many natural languages in cognates of these words). I'll try to listen carefully when I have the next oportunity.

@OliverMason I do not think a glottal stop is used that much to delimit morphemes in Esperanto - though many people use it in correlatives ([tiʔel] etc) because it is difficult not to pronounce a glide there.