I have been renting with SimplyLet for two years and will be renting for a third next year. They have been absolutely great in terms of replying to mails and maintenance requests and will usually have someone out to fix an issue the next working day when we submit a request. We have had no issues with them whatsoever and are hopeful our move out process will be as good as our experience so far.
Very quick prompt responses to maintenance issues occurring in the house; however, often use very chea,p easy ways to fix the problem that only work for the short term, so have to push quite hard to get the proper solution to the problem.