I've never found an hour enough but it's certainly better than 50 minutes which is all I got with all my former T''s. The trouble with 50 minutes is that it took me about 10-15 to settle in enough to get to the 'nitty gritty' and ten to wind down afterwards, so that only left about 25-30 minutes for the main part of the session which was ridiculous.

Current T gives me an hour and while it's still short, I find the extra ten minutes makes a massive difference. Plus I can't see the clock which actually relaxes me as I'm not constantly checking it and adjusting what I talk about according to the time I have left. When the clock isn't there I don't worry about it and it frees me up to say more.