Britax Trekker 3 Wheeled Pushchair ....

[stressed out]

Hi I was thinking of getting this buggy and wondered if anyone has or had one of these and what you thought? Do you recommend it? Is it easy to fold and put in the boot? Is it easy to get in and out of shops, doorways and on and off buses?
I have a 3 month old son and a 3 and a half year old son, the older one will be starting a nursery in September and he is not great at walking alot as he gets tired and runs off and i was going to get a tandem buggy but think it's not economical now as he will be to old for the double and i will have wasted the extra 100 quid and have 1 empty seat!... I have seen this Britax at a reasonable price and was thinking of buying for the baby and if needs be to buy a litaf pick up seat to attach behind or something for the older one? Thanks