If you are referring to the ability to buy and sell there, I don't think there is a possibility of withdrawing, at least not yet.
Avoid to deal with Skrill/Neteller when it comes to crypto, at least not directly with them. Use third party services like BitPanda or trade with other individuals.
Completely correct, they're only handy when you want to use Bitcoin to pay on websites that only accept Neteller for example.
Other than that, they indeed do not allow withdraws of Bitcoin and you can also not use your Bitcoin balance with their Mastercard.
Other than that, they're pretty reliable, I don't agree at all with Slow death saying that they're unreliable.
Once you are verified, you will not have any issues with them.