For country-specific info, go to UK Border Agency | UK Border Agency in Egypt.
The visa agency they use in Egypt doesn't seem to have the best of reputation so check and double check everything.
In any settlement application, the three central issues are:
Quality of your relationship, i.e. a genuine, serious relationship, not a scam.
Sufficient maintenance - usually your (UK sponsor's) income.
Suitable housing - which seems sorted.
Do ask us about any other specific issues.