Need Someone to Double Check permissions.yml

Hey,

I created a server recently and this is the first time I've ever dealt with permissions. I looked at some tutorials and this is the permissions.yml that I wrote.

groups:
guest:
default: true
permissions:
- permissions.build: false
- essentials.afk: true
- essentials.list: true
- essentials.msg: true
- essentials.realname: true
- essentials.rules: true
- essentials.suicide: true
- essentials.spawn: true
- essentials.back.ondeath: true
- essentials.keepxp: true
- essentials.tpa: true
- essentials.tpaccept: true
- essentials.tpahere: true
- essentials.tpdeny: true
- essentials.warp: true
- essentials.warp.list: true
- factions.kit.halfplayer: true
prefix: '&7[Guest]'
member:
permissions:
- permissions.build: true
- factions.kit.fullplayer: true
- essentials.mail: true
- essentials.mail.send: true
- essentials.me: true
- essentials.sethome: true
- essentials.home: true
- essentials.delhome: true
- essentials.chat.color: true
inheritance:
- guest
prefix: '&2[Member]'
vip:
permissions:
- essentials.nick: true
- essentials.nick.color: true
- essentials.ptime: true
inheritance:
- member
prefix: '&3[VIP]'
moderator:
permissions:
- essentials.god: true
- essentials.give: true
- essentials.fly: true
- essentials.speed.fly: true
- essentials.time.set: true
- essentials.clearinventory: true
- essentials.invsee: true
- essentials.invsee.modify: true
- essentials.time: true
- essentials.kick: true
- essentials.weather: true
- essentials.tp: true
- essentials.tphere: true
- essentials.tp.others: true
- worldedit.*
inheritance:
- vip
prefix: '&1[Mod]'
admin:
permissions:
- essentials.*
- voxelsniper.*
- factions.*
inheritance:
- moderator
prefix: '&c[Admin]'
owner
permissions:
- '*'
prefix: '&4[Owner]'


Before I put it into use, I wanted to have someone go over it and make sure there aren't any errors, and, if there are, help me fix them.

I'm using PermissionsEx.

Thanks!