I did the same . I opted for the highest risk investments which proved not to be so so poor performance.
I signed up when MSE had a £40 cashback for £400 investment. Currently up to £402.46 and expecting the £40 in August. May be worth waiting until another deal like that comes along just to add a bit of a safety net :)
Signed up a couple of weeks ago - nice iOS app but they don't show individual funds unit purchase price, nor the amount of each fund - all you get is a graph, a list of funds but no idea which, if any are making a profit or loss. I'm less than impressed with customer support as they say there is no assurance that this information will be made available, so how can anyone tell which funds to invest in or drop. Also, you have limited choice - Wealthify don't let you select funds - you are 100% at their mercy.
Interesting... Experts, please their in your two pence worth of advise...