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My design is a set of dining plates that can reduce the time for preparation and cleaning, which is especially suitable for people living in city.

Although inexpensive, the plate looks modern and presentable. Formed by soft line using the white color as the main theme, it is light and thin. The mug is not boring either because of its modern flat shape instead of traditional circle shape, which adds to the value of living quality.

There is no problem using them to feast your friends at a party or a formal dinner. Of course, it can also be used at restaurants, coffee shops or for airline meals.

not boring 是否 interesting ?
用 not boring 形容個 mug 怪怪地, interesting 較好些
可否用 The mug is ergonomically desgned

雖然 cheap 解便宜, 並且解價廉質劣, 正常不說自己設計的用品 cheap
石破天驚用 inexpensive 絕對同意
Use "inexpensive" above things that are of good quality, even though they do not cost a lot.

2014-07-08 02:03:43 補充：
feast your friends 是錯

單獨 feast 如果解 "盡情地吃" 是 intransitive verb, 無 object

feast on (phrasal verb) something ~ 盡情地吃; 飽餐
We feasted on steak and potatoes
feast (transitive verb) your eyes on - 盡情欣賞; 飽眼福
If you like luxury cars, feast your eyes on these.

a city-dweller = someone who lives in a city

2014-07-08 02:52:20 補充：
Jenkin:
你習慣寫 run-on sentences.

你同意用 cheap, feast your frirnds 和... in a quite dinner ?
What is a quite dinner?

你用錯 used for
is/are used for (purpose)
Methane gas is used for heating
The red files are used for storing old invoices.

They can also be used in restaurants, coffee shops...

My design is a set of dining plate(s) that can reduce the time for setting and cleaning, it is especially suitable for someone who lives in city.
Besides [“that”是多餘的。當寫Besides作開始時，檢查後面所寫的跟前面的關係是”除了以上所講的外，還有以下要講來補充嗎？還是其實已是另一個副/分題：上文是講應用或適用的好處，下文是講它的形態，是besides”除上之外”的另一些好處，還是in additional”除了功能上的好處還加上另一些好處], it is cheap but looks modern and presentable, the plate is light and thin, [it’s formed by soft lines這句用了中文思想寫出來，英文formed by是製造的結構，不可能是一條線或許多軟線，用中文想當然明白你的意思是構圖的線條，但是實物形容是碟的”邊”不是尖或起角]with soft edges[假如你是形容彎或弧形的便要改為with curve edges], using the white color as the main theme. The mug is not boring [這 as well 表示有之前另一樣同樣not boring的東西，但我找不到，所以留意你思想上前面以為講了有另一樣不boring的東西不代表句式上你寫了出來] because it’s of modern [flat一隻”平”的杯現實難以想像-所以無法修改了，你自己想想怎辦；對比下文你話的circle shape我估是正方形的口，英文可以寫為square] shape instead of traditional circle shape, adding the value to living quality. There is no problem using them to feast your friends at a party or in a quite dinner. Of course, it can also be used for restaurants, coffee shops or airline meals [at一個地點是指位置，但你是在說在這些地方或情況”使用”那些餐碟是use for.]