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I don't have a 5S but I do have a 5C. I am not going to install iOS 11 on my spare iPhone (5c). It will probably make it slow way down. I already noticed it a lot slower on the latest iOS 10 release.

I wouldn't suggest installing the beta.
 
I hope the final version wont make iphone 5s laggy like ios 7 did with ip4 or ios 9 with ip4s
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I don't have a 5S but I do have a 5C. I am not going to install iOS 11 on my spare iPhone (5c). It will probably make it slow way down. I already noticed it a lot slower on the latest iOS 10 release.

I wouldn't suggest installing the beta.
5C and 5 are not supported anyways.
 
I don't have a 5S but I do have a 5C. I am not going to install iOS 11 on my spare iPhone (5c). It will probably make it slow way down. I already noticed it a lot slower on the latest iOS 10 release.

I wouldn't suggest installing the beta.
iOS 11 is compatible with iPhone 5S and newer . 5c is obsolete now
 
I would subjectively be careful with installing this before it's confirmed there are no problematic aspects.
 
I hope the final version wont make iphone 5s laggy like ios 7 did with ip4 or ios 9 with ip4s
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5C and 5 are not supported anyways.
#3

Well for my iPhone 5S it's really slow, and i did not have a problem last year i remember i installed iOS 10 BETA 1 and its almost the same to the stable iOS 9.3.5 Its just like running iOS 9 on iPhone 4S and in some areas much slower and even worst! Booting up takes 1 minute and 15 seconds compared to 40 seconds in iOS 10!.

Might as well you should wait for the official release of iOS 11 This FALL in September. Because the first 3 Betas are known to fixed bugs.

But, Don't expect that iPhone 5S will get the same speed like iOS 10 or will speed up after the Final release of iOS 11.
Because, iOS 11.0.1 (official) will just fixed the errors, and remaining bugs and stutters. But for performance boost? the Answer is opposite, because once iOS 11 is released iPhone 5S might be little to no performance boost or even slower because iOS 11 will add even more features to strain the hardware of iPhone 5s. Because iOS 11 is designed for iPhone 8 ONLY not for iPhone 7 and older.
 
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